Use to lift the frame 10mm off of a hard surface. I use these on a Rotor Riot CL1 frame. I designed them because the stock ones from Rotor Riot kept filling the logo with grass.

Printing: I printed this in PLA, and it worked well. No supports or rafts are necessary. I would recommend 3 perimeters, top and bottom layers for durability. Infill should not make too much of a difference, but I used 20%, and as far as I can tell, they are basically indestructible.

I attached the Fusion 360 .f3d file if you would like to modify.