I designed this because my old Quad (gfk and alu) did not survive a "doing a cardwheel on beach" as new acrobatics and I needed a project to get again into 3d printing. And of course "Because we can" :-) I could only do a short test hover in my room, too much snow atm. But it looks/flies good and stable. It prints quite easy and is stable enough. I tested different Infills for the arms, but it seems not so criticall. Maybe (eyeballing) the honeycomb fill is the best for this geometry. I use 8x4" props on it. Motors KD A20-26M 15A 1130KV, ESC I don't know. MultiWii on a Flyduino NanoWii. Some standoffs and m3 nuts and bolts. Accumulator: 3S 2200 25C Turnigy. Use the .blend to change it to your needs. I used many modifiers, so it should be easy to chance it.