For installation, just stretch the spring out a bit with some pliers. Be careful not to pull it out of its socket. If you do, it’s a little hard to get back in but it can be done. Then, just slide the magnet through the side of the spring and it will stay in place underneath it.
This setup is plenty strong and it can reliably hold LT1 Mini up on vertical surfaces.
That gives me an idea. I could 3D print a wider base for my LT1 Mini, embed a magnet into it, and then use that magnet + the magnet in the tailcap to hold the wider base on.
If possible, print the base so that it can be stored atop the head when not in use. Like an inset ring on the bottom of the printed base that seats onto ring protruding from the top of the head.
Light arrived, looks nice. Guess I’ll have to break out the 3d printer and laptop to see if I can design a wider base for it, if no one else hasn’t designed one yet.