Can only get involuntaries at goofy times?

First things first, you are getting nice feelings during sessions which is a good sign. You get those sensations from the prostate I presume. Could you explain them?

Second thing is that you already had orgasms. That should tell you that you are able to orgasm. It should tell you that it isn't impossible for you to get them. So relax and keep that thought! Don't get frustrated because that is only counter productive!

Now, relax, don't be frustrated and surrender to the sensations. There are a few tips that I can give your first:
1. You need to be truly relaxed! Yes, I know this had been said like a billion times here, but sometimes you think you are relaxed, but you just aren't. I realised and learned to truly relax by listening to erotic hypnosis tracks. Try it and start with Nikki Fatale. Look on the web which tracks of her are best for beginners. She has a nice, sexy and soothing voice, but she is also less direct. There are some erotic hypnotists out there that have some 'extreme' submission femdom tracks. Nikki Fatale isn't like that. It's femdom, but not so 'extreme' that it becomes uncomfortable. It may take some practice listening to erotic hypnosis tracks, but when it works and you are susceptible to erotic hypnosis, you will learn not only how to truly relax, but also how to let the sensations generated by the aneros go wild and go on and on, which is needed to go from p-waves and regular O's to Super O's. After you have learned how to truly surrender and relax it is advised to stop erotic hypnosis.
2. Be aroused! This has also been said like a billion times on the forum. Arousal is not simply having an erection. Mental arousal is also needed for the aneros, not only fysical arousal. Erotic hypnosis helps with this. Think about your fetishes and fantasies and try to use them to reach new heights and give you the push you need.
3. Let go! A problem that I experienced and could still sometimes experience in the future (I recently had what I think was a Super O so I don't know if I really am rewired and I also don't know if I can replicate the incredible session I had easily) is the ability to let the build up of sensations last long enough to reach a Dry, Prostate, Anal or Super O. Listening to erotic hypnosis tracks that work for you helps you to go into a trance and helps you truly relax, which helps you to let the build up of sensations last long enough for you to reach a Dry, Prostate, Anal or Super O.
4. Don't be so impatient! This also has been said like a billion times. Impatience forms some sort of a barrier when trying to reach a new breakthrough or when trying to reach a Super O. Like every journey things and steps take time. Treat yourself to every sensation, but don't lose sight of what you want. Also count every breaktrough as a breakthough and let it give you hope on reaching a Super O.
5. Write down your experiences! This can help you remember experiences and sessions that were succesful. By doing this it could become easier to remember and use succesful choices, but also findings you made in particular previous sessions. Replicating succesful choices and findings can help you on your journey to reach the next step.
6. Research! This has two aspects. The first one is reading experiences of others on the forum and what they did. Try to think if something someone else tried would work for you or not. If you don't know try it out and find out. The second aspect is that sometimes things you try out don't result immediately in progress or new sensations that would lead you to a Super O. This does not necessarily mean that the thing that you tried won't work for you in the future or is not the thing you were looking for to reach another breakthough or Super O. Researching means you know for certain the thing you tried works or doesn't work. Sometimes a certain position for example feels good, but doesn't enhance the sensations of the aneros. When this happens it doesn't mean it will not work in the future and maybe the position you feel comfortable, but doesn't generate any sensations at the time may work if you combine it with a different way of thinking or arousal level. Be thorough in trying things out and figuring out what works for you and what not. So don't try many different things back to back!
7. Less could be more! Don't think that you always have to use contractions to reach a Super O. Using contractions could impede your ability to relax. Contractions may feel good, but if they impede your ability to truly relax you may want to reconsider using contractions. Try to use the 'do nothing technique' if you are not able to relax while using contractions. Again try to find out what works best.

Think back also when you where getting the orgasms. What were the ingredients and situation you got them in. You could try to recreate that, but you can also try something like this: https://community.aneros.com/forum/discussion/16206/using-the-force-039a-new-way-to-rewire039#Item_30 The techniques in this post have helped many people and if it works it can produce involuntaries. The key thing is to relax, surrender and be open! Don't be frustrated, you have orgasmed before and you get sensations do it's there! Remember that!

Which device(s) are you using?

First things first, you are getting nice feelings during sessions which is a good sign. You get those sensations from the prostate I presume. Could you explain them?

Second thing is that you already had orgasms. That should tell you that you are able to orgasm. It should tell you that it isn't impossible for you to get them. So relax and keep that thought! Don't get frustrated because that is only counter productive!

Now, relax, don't be frustrated and surrender to the sensations. There are a few tips that I can give your first:
1. You need to be truly relaxed! Yes, I know this had been said like a billion times here, but sometimes you think you are relaxed, but you just aren't. I realised and learned to truly relax by listening to erotic hypnosis tracks. Try it and start with Nikki Fatale. Look on the web which tracks of her are best for beginners. She has a nice, sexy and soothing voice, but she is also less direct. There are some erotic hypnotists out there that have some 'extreme' submission femdom tracks. Nikki Fatale isn't like that. It's femdom, but not so 'extreme' that it becomes uncomfortable. It may take some practice listening to erotic hypnosis tracks, but when it works and you are susceptible to erotic hypnosis, you will learn not only how to truly relax, but also how to let the sensations generated by the aneros go wild and go on and on, which is needed to go from p-waves and regular O's to Super O's. After you have learned how to truly surrender and relax it is advised to stop erotic hypnosis.
2. Be aroused! This has also been said like a billion times on the forum. Arousal is not simply having an erection. Mental arousal is also needed for the aneros, not only fysical arousal. Erotic hypnosis helps with this. Think about your fetishes and fantasies and try to use them to reach new heights and give you the push you need.
3. Let go! A problem that I experienced and could still sometimes experience in the future (I recently had what I think was a Super O so I don't know if I really am rewired and I also don't know if I can replicate the incredible session I had easily) is the ability to let the build up of sensations last long enough to reach a Dry, Prostate, Anal or Super O. Listening to erotic hypnosis tracks that work for you helps you to go into a trance and helps you truly relax, which helps you to let the build up of sensations last long enough for you to reach a Dry, Prostate, Anal or Super O.
4. Don't be so impatient! This also has been said like a billion times. Impatience forms some sort of a barrier when trying to reach a new breakthrough or when trying to reach a Super O. Like every journey things and steps take time. Treat yourself to every sensation, but don't lose sight of what you want. Also count every breaktrough as a breakthough and let it give you hope on reaching a Super O.
5. Write down your experiences! This can help you remember experiences and sessions that were succesful. By doing this it could become easier to remember and use succesful choices, but also findings you made in particular previous sessions. Replicating succesful choices and findings can help you on your journey to reach the next step.
6. Research! This has two aspects. The first one is reading experiences of others on the forum and what they did. Try to think if something someone else tried would work for you or not. If you don't know try it out and find out. The second aspect is that sometimes things you try out don't result immediately in progress or new sensations that would lead you to a Super O. This does not necessarily mean that the thing that you tried won't work for you in the future or is not the thing you were looking for to reach another breakthough or Super O. Researching means you know for certain the thing you tried works or doesn't work. Sometimes a certain position for example feels good, but doesn't enhance the sensations of the aneros. When this happens it doesn't mean it will not work in the future and maybe the position you feel comfortable, but doesn't generate any sensations at the time may work if you combine it with a different way of thinking or arousal level. Be thorough in trying things out and figuring out what works for you and what not. So don't try many different things back to back!
7. Less could be more! Don't think that you always have to use contractions to reach a Super O. Using contractions could impede your ability to relax. Contractions may feel good, but if they impede your ability to truly relax you may want to reconsider using contractions. Try to use the 'do nothing technique' if you are not able to relax while using contractions. Again try to find out what works best.

Think back also when you where getting the orgasms. What were the ingredients and situation you got them in. You could try to recreate that, but you can also try something like this: https://community.aneros.com/forum/discussion/16206/using-the-force-039a-new-way-to-rewire039#Item_30 The techniques in this post have helped many people and if it works it can produce involuntaries. The key thing is to relax, surrender and be open! Don't be frustrated, you have orgasmed before and you get sensations do it's there! Remember that!

The feelings I get are like a really good sexual feeling, my hands get tingely and numb. Sometimes I am able to get into a state that is almost like a pre orgasmic state, but never goes further. I used to get a bit further, I would feel really good and have the 'heart pounding' episodes, but would die out quickly. I don't ever seem to even get there anymore. I have all of the Nikki Fatale tracks, not sure they do much to relax me. I try to just completely relax, but it doesn't seem to help me.

I very vividly remember the first time I had a dry orgasm about 2 1/2 years ago. I went to bed one night, no aneros inserted, and just curled up on my side and concentrated on my prostate and breathed and relaxed. It quickly felt like someone was squeezing my prostate in their fist, I forced myself not to do anything at all. No contractions, nothing. Just breathe and relax. The squeezing harder and harder, until I felt myself suddenly get semi-hard and came just like during regular sex. But it was dry. It was so cool, managed to duplicate it a few more times over the next few months, but none in the past 2 years. Can't seem to replicate that session for anything!