Issues With the Holy Trainer Device

Gentlemen: So I found out that what I have is an HT2. From my understanding, it’s a faithful copy of the original (I paid roughly $15 plus shipping). I chose to begin my chastity journey by wearing just the scrotal ring first, giving my body some days to adjust before adding the penis cage. After working out how to put the ring on properly—since my testes always seem to ride very high—I wore the largest size for a few hours and it felt okay. The next day I managed to get the second-largest ring on, which also felt fine. It was actually so comfortable that I decided to wear it overnight. I only woke up once, probably during a typical nocturnal waking period. The following day I showered, got dressed, and continued about my routine. Sometime midday, I started feeling some discomfort in the scrotum area. I ignored it for a bit, but it became quite insistent so I took the ring off, which made the discomfort increase slightly. For a few days after that, I had this twinge-y sensation down there in one of my testicles. I waited a few more days and decided to try the larger ring again, but eventually experienced similar sensations. This has now happened a couple of times, so I’m going to wear it for a full week to see if whatever is wrong resolves itself. I can certainly understand pain if I were wearing the full cage while trying to get erect or have been locked continuously for three weeks, but this is happening with just the scrotum ring on and appears without any pinching. Any ideas what might be going on? In your experience, are there men who are physically unable to wear a ball trap design? It doesn’t seem like blood flow is blocked, but what do I know?