Light and >usable< 3D printed 3" frame !
Free to download / customize
When printed out of nylon, it's more durabel than some not so well designed carbon frames
Also it is quite stiff, comparable to 2.5mm thick 3" frame with wrong direction of fibers on arms !

Keep the build light and it will fly and last long !
Nice performance even old and super cheap parts ! ($5 1104 motors, aio 25mw camera from leader 120, 3yrs+ old 10A f3 stack + BF 3.5.7)
Flies surprisngly well and fast !

Video: