I got myself a Good Things (Don't) Cum in Small Packages Resin Cage and and tried it yesterday for the first time. At first i tried the largest ring (52mm) only to discover that it wasnt tight enough and my balles slipped out with the first in cage errection. The second largest ring (48mm) seemed to fit better even tho it felt a bit funny when first put on, but got better when the cage was properly locked, or so i thought. I wore it for ~4 hours without major problems, took it off and went to bed. Today i woke up with pain, located in the marked area of the attached image, that still hasnt left me as i am writing this this evening. Another problem i discovered while wearing is that during chastity my penis would shrink into the back of the cage leaving the first third empty, then when my member tried to get errect it would expand to the sides first, prohibiting the forward expansion due to friction,making proper wearing impossible. Id like to solve these problems without having to buy a new cage, any tips from more experienced people would be very welcome.