Achieving a super-O (Tips)

I have been using the helix syn now for few weeks and am finding it difficult to achieve a super-O. I feel sometimes that I do get pretty close to it (my body shakes and feel like my head is going to explode sometimes) but then my body tends to stop at that point. I try to keep going and hold the syn in but am not really sure if what am doing is right sometimes. Would I be better trying the trident toy or something else that maybe vibrates. Am starting to think that maybe my body just won't go to that next stage of the process to achieve a super-O. I do feel relaxed and that after using the syn but I know that there is def something more. If any of you guys can give me some advice would appreciate it, thanks 🙂