Quad Lock to 1/4-20 tripod adapter plate
A disc that screws onto any tripod, gimbal or selfie stick with a standard 1/4-20 thread and carries a Quad Lock style twist recess, so a phone in a Quad Lock case locks on with a quarter turn for filming. The recess copies the four-lug case pattern, about 37 mm across and 4 mm deep, with a printed friction bump holding the twist, and the underside has a 6.35 mm threaded boss modelled as a 1/4-20 profile or a pocket for a brass insert nut. The disc is 45 mm across and 8 mm thick and prints flat.
Tripod adapters from other printers are drawn for one case revision and one printer's tolerances. In SpeakCAD you describe your case lugs and whether you want printed threads or an insert, preview the plate free in the browser, refine the fit in the chat, then download the STL.
Design a 45 mm diameter, 8 mm thick tripod adapter disc with a Quad Lock style recess 37 mm across and 4 mm deep having four 8 mm lug notches that rotate 45 degrees, a 0.6 mm friction bump, and a 1/4-20 threaded hole 7 mm deep in the underside.