I am a bit frustrated. User of an Helix once every 1-2 weeks since.. 2 years? All tridents. Note I am quite a thin person (136 lbs) per 5 foot 8. I usually need to do something like 2h of session. My best position seems to be on my back, with a pillow below, On the side i loose track soon.
Here’s what I usually do: I get there, empty out, wait, relax, get aroused and pull the helix syn in. Start breathing deep, after a few minutes, also with my stomach. I tend to feel the pressure as need to pee. After a few minutes when I exhale i can feel something happening, like a bit when you did something wrong as a kid and you got something sinking in your stomach, but pleasurable.
After a while, I would get to a point where it starts feeling quite good very few seconds. Those sensation come and go. Some precum.. Then my dick would get hard and things starts to go south, as i usually don’t get contact with my prostate anymore. I move position and i manage to get it again.
At this point (say, 30 mins in) I usually need to start some contractions (I am trying to Kegel these days) but in general i try the Tug of War technique. Nothing, would change from the above scheme. I can go slow, I can go fast i still get some of those erections, some of those good feelings but then things die out.