Nice to have a little workshop to hash out ideas on the fly =)
Was working on reverse engineering a Steelworxx tube (to hopefully make my own one day... tsk tsk, yeah I know I'm a pirate) when I had an idea. I had one of those inflatable dildo/buttplug things laying around and thought "This would totally fit on my tube" Well, it didn't, not on mine anyway. I still have that smaller mistake of a steelworxx so I cut the dildo and, with a little lube, stretched it on. Here are the results
A pretty good fit. I had to warm it up using hot water to make it stretch and then I cooled it down in ice-water. It's stuck pretty good. It will take a lot of effort to remove it. Now, this chastity is too small for me to fit in so I had to improvise. I took some random shots in briefs to kinda give an idea of what it would look like.
The rubber goes back enough to cover the integrated locks. I bet someone could pull this off in tight jeans or even speedos. Really wish I could try it out! I'm going to have to find a bigger inflatable dildo! (that's what she said)