Mature Metal discussion

Hello, It seems I am in the same boat as lock4ever, having had discouraging experiences with typical plastic devices… I’m curious if a Mature metal device could be superior due to its custom sizing options… The main issue is that I appear to be just slightly larger than what these devices are built for. Also, since I have extra skin, I’ve ended up needing to plug some of the ventilation holes on both my cb-3000 and birdlocked models. If left unplugged, my skin puffs out significantly and gets irritated easily. The jailbird is nice, but I worry about problems with skin getting caught between the bars, along with edema and irritation.. Other designs might share these same issues… The Pet Trap looks promising for avoiding this. Does anyone have experience with it? Another challenge I face is that I am a grower. This is where custom [larger] cage sizing should help the most. The big problem in my cb-3000 is that when width increases, attempting an erection pushes me backward so only the head remains inside the cage. This creates about an extra inch or two of pull on my scrotum. Is this a frequent issue? I hope that with a larger diameter and slightly longer length, it will expand inward within the cage rather than pushing out, resulting in much less pulling tension. Any thoughts or advice regarding these issues and how MM devices might address them? Thank you beforehand..