modifying depth of insertion.

Every body is different so you have to determine what is right for you! As for myself I had not been inserting deep enough - have found my sweet spot when the head of my Aneros passes through the second sphincter and hooks itself there. Not only does it hit the prostate but does not tend to fall out as many have experienced, myself included! Once in place and hooked in place, the pleasure builds with each contraction until the big O hits and continues! Both the K and P tabs stimulate as well once position is booked in place! 

lve always found the helix go right in to the T part, mgx obviously goes straight in, recently been using the tridents, but get the same result.. mostly just feel like and eventually having to go for a pee so l think all my aneros hit my bladder and not my prostate. though like l said l do leak some pre-cum but its always the same, l pee a good few pints and then lm back to just sitting there with the aneros lol.

been thinking maybe l should get some foam to put between the p-tab and my body in hopes it could decrease the depth of insertion.

l should note that lve got the PSY model, but again no matter how l edit the arms it always buries itself right to the bottom or the model and lve never seen any explanation on the model past saying its adjustable.. what does does editing the P-Tab control and what does editing the K-Tab control? basically put if l rode my PSY which tab do l change to control depth? because lm somewhat sure lm hitting my bladder rather than the right spot because its going too deep.

Use  treasure map of @supaokami , it may help you find your prostate.

https://community.aneros.com/forum/general-discussion/a-treasure-map-for-the-unsuccessful/

I think you'll need something between the tabs and your body, like a bumper or shim. I've had good success with the method I outlined here : 

Polymer clay bumpers

Been playing around with foam only had one session so far though so still need to do more testing 

I've been experimenting with a foam spacer too, I haven't reached any conclusions about the distance, but the material is great for the purpose. It's a hard foam I cut off some packaging. Solid enough to retain its shape, but delicate enough that it's easy to cut. Ideal, apart from the porous nature of it, since I don't know if I'll be able to clean it in any meaningful way.

Have had best success with the Syn models. Depth of insertion is very important to achieving good results for me. Upon inserting my MGX Syn the head naturally seems to go up and over the prostate and latches itself there! Then it proceeds to massage the prostate as the tabs stimulate externally and rock back and forth as I tweek my nipples eventually producing an explosive super O! The pleasure is overwhelming as it continues!