Hi Vanman and sorry for the delay in replying. Please let me know if you are using the battery or manual system as the battery cylinder is slightly smaller. With regards to trapping your scrotum, i would recommend using the largest ring and putting plenty of gel around the ring to get a good seal. Trim back all your hairs and keep pulling the scrotum away from the cylinder. Introduce the head of the penis first and let the vacuum suck it in to the cylinder slowly. If you are not getting a good seal, push the base of the cylinder against your body and that will also help to stop the scrotal entrapment. As your penis firms up and you get used to it, you may find that dont need a cylinder ring. I can also send you a small piece of foam that you can put on the base of the cylinder to help if necessary. Please let me know how you get on and email me again if you need more advice or email me off forum if you prefer,
kind regards
Steve
steve@noogleberry.com