I don’t do stomach, I used 31g 5/16” insulin needle and I’ll pin in delts, quads, or glute. Oil based cyp. Can pretty much put anywhere. Zero pip at all, flows smooth through oil. I don’t do stomach bc I don’t feel comfortable bc it’s oil based, but I just don’t know enough about pinning in the stomach sub Q, I’d have to research more. Other than that I’ve had zero issues what so ever. I can say switching to every day pins at such a small dose has been night and day. No side effects at all. All my labs are in perfect range too. I used to do 2x a week IM and hated how I felt.
Obviously I’m not saying the gel isn’t good, I’ve used both. But after switching to my new protocol. I would never change. I also use Merek Health for my trt and hormone optimization. Hope this helps some bro