Am I using the wrong Aneros? Any tips?

Hi guys! So I read about prostate orgasms about 4 years ago, and got myself an Aneros MGX to start prostate play. At first I think I was too eager and was trying to force a prostate orgasm by contracting my PC muscles over and over. Then I figured out that just relaxing and letting the Aneros kind of do its own thing was better. No big-O, but I sometimes got some great full tingly feelings in my abdomen. Usually at this point, I got excited and my heart rate increased, which could sometimes kill the feeling. Does it sound like I’m on the right track? Any tips?

Although I haven’t regularly used the Aneros in about a year (only a few times since then), I’m still eager to have a big-O and want to try it out again. I recently had some chronic soreness in my left testicle, and the doctor diagnosed me with a minor prostate infection and put me on antibiotics. He also mentioned during my exam that I had a fairly small prostate. I’m a tall guy (6’5″ and 200 pounds), but is the MGX maybe the wrong one based on having a small prostate? I’d appreciate any input. Thanks guys!