CB6000 Short Cage versus Holy Trainer V2 Comparison

Sorry if this was covered before; I’ve been hunting for the answer but haven’t had much luck:( Here is where I am at: After months of anxiety and uncertainty, I finally told my wife about wanting to be in chastity. Despite some awkward times both sexually and otherwise, she has adjusted well and seems to accept it. I began with a chrome CB6000 but found the length excessive. The helpful staff at .au allowed me to return the used unit and sent out a brand new CB6000S (short cage) in its place. This fits much better for my frame. The problem is that the metal padlock sticks up quite high, and one morning my wife mentioned it felt like she was being jabbed with a stick while we slept. That isn’t really what I want. Aside from leaving the lock off entirely, I’m not sure of other options. While researching, I found the slimmer Holy Trainer V2 (HTV2). My main worry is sizing. They provide guidelines for getting it right, but since I messed up the CB6000 size initially (which led to swapping down from the standard to the S), does anyone know if switching from a CB6000S to an HTV2 makes sense? Specifically: Is the CB6000S roughly equivalent to the full-size HTV2, or is it closer to the small cage version of the HTV2? The ring sizes are clear enough, but the cage lengths confuse me a bit. The standard HT looks similar in length to my current CB6000S, so I wanted to check with those who have more experience before deciding whether to buy the standard or small HT. Thanks! P.S. Because I have a foreskin, it tends to get dry and red when worn. I use the stocking method for application and only wear mine overnight (not during daytime hours). I also ensure enough foreskin is retracted so it doesn’t poke out of the cage opening. Any tips on reducing irritation? Oils or lubricants?