Hey there Blue Fox,
hope you're doing well and that i'm not going to be a killjoy, but:
That thing looks like an incoming testicle lesion/crush if you get the slightest bit longer than an inch when hard...even though you said you're 'turtling out' of your cages, do you want to risk losing your balls?
I mean, i can be wrong on the whole subject, but it looks to me as if it would quite crush or rip your balls off, in case you get hard wearing it...
12/10 wouldn't dare to wear myself!
Did you try those micro cages yet? Maybe these are an option for you too...of course you'd need one with a quite tightly fitting locking ring, but imho i'd ditch the whole 'locking up in a cage'-thingy, if the only option for me would be a 'cage' that has the word castrate in its name and looks like it's most likely going to do that...
I'm sorry i can't give any constructive feedback on this abomination of a 'cage', but simply looking at it scares the shit out of me!
Anyways, have fun, stay safe(!) and healthy