I wanted to move this to it's own thread rather than completely taking over a generic GB Mod thread. I have a Terror Dog mod that I originally made for myself. It's 50mm and 3D printed. I hand paint them and seal them with a glossy acrylic. They are made to mount around the Terror Dog target and insert. There is no specific mounting process, most have mounted with either a zip tie or discrete wire mount.
They are $15 each and USPS First Class shipping is $4. For international shipping I can provide an exact quote. I am producing these in batches and will PM for payment when I have a batch ready to ship. If anyone is interested feel free to PM me and I am maintaining a list to contact.