[Dragonfly DIY] Bicycle tail accessory mount

I've had a lot of trouble getting acceptable rear mounts for my taillights and rear camera on my bicycle, since I ride with either a rack trunk bag or a garment bag, both of which obscure things mounted on the seat post.

Over the weekend I decided to brainstorm, I brought the bike into the lab and came up with this. I think it's a winner.

Here are the source files and a writeup on YouMagine if you like it. Or send me an email if you want one and don't have a 3D printer.