better ELRS DIY JR module base

This is a remix of the official ExpressLRS JR module bay.

I noticed that the official one didn't fully lock into the JR module slot, and after a bit of tinkering I found out that the little clip is way too long, and doesn't engage with the slot.

I took some measurements, and cut it up to size. It's a bit smaller than the clips on non-DIY modules (such as the crossfire module I have), to allow for 3D printer tolerances.
Speaking of them, I also scaled the whole model up a bit as the original was way too loose, now it's pretty much spot on but you can scale it down a bit if you feel that it's just a bit too tight for you.

I don't know if it was a problem only with the Radiomaster TX16S, but it now is compatible with it. Enjoy!