Update : will work with 2x M5x50 hex bolts. You may want to find an easier way to tighten the screws. For the record, repurposed Gopro (or similar) tightening parts are pretty convenient and durable, and it's all M5 bolts. I added some hollow shape to modify the inside density of the part.
That’s a remix of the Samyang 135mm F2 Tripod Bracket (Stativschelle)
by user nurv.
I needed a mount to use on my Star Adventurer. It’s designed to receive :
-a "Standard 1/4"-20 Female to 3/8"-16 Male Screw Adapter".
-2x M5x50 screw and M5 hex nut.
You need to use a ¼" threaded rod and a lighter to warm up the nut and weld it into place. Use cold water to freeze the welded plastic. You may want to train a bit before trying on the real one.
Polymaker PLA Polymax