A minimal size 3D printable frame for 3 inch blades (can't go smaller than 110mm for clearance reasons).

The frame is designed to fit most 1102-1407 brushless motors and has built in 20mm mounting holes for the electronics. The printed frame is 11-25g, depending on perimeter settings, infill settings, and filament type.
There is no battery mounting hardware designed in.

This frame is untested as I don't have the parts for a 3" quadcopter. If you do print and build on this frame, let me know how well it goes!

SeeMeCNC

Rostock MAX

No

No

0.35mm nozzle

Printed on my Rostock Max V1 with eSun green PETg.
Settings:
0.35mm nozzle, 0.2mm layers, 1.05mm/3 layer perimeter, low infill (~10-15%)
It should be able to print just fine with 0 infill as well.