I'm new to 3d Design and I literally just took two designs and put them together...

You can find them here:

Modular mounting System by HeyVye
https://www.thingiverse.com/thing:2194278

Quad lock Screwed by Bewegingslab
https://www.thingiverse.com/thing:3111529

I printed it in two parts to screw them together because it's much easier to print and i wanted to make sure the quad lock part works before I print anything else.

 IF YOU WANT TO TRY THE QUAD LOCK PART YOURSELF BEFORE YOU PRINT THE REST MAKE SURE TO ATTACH TWO SCREWS TO GET SOME LEVERAGE, OTHERWISE YOU'LL HAVE A REALLY BAD TIME TRYING TO GET THAT THING REMOVED FROM THE BACK OF YOUR PHONE

Printing them together would be a really bad idea because the quad lock part has to be really precise but feel free to try it and be sure to post your make!

Anycubic

All-metal Mega

Yes

Yes

0.1 (quad lock part) / 0.3 Mount

60% (I'm sure you could do less)