3DR Iris+ arm

Work in progress! This should allow you to print replacement arm for your IRIS+ quadcopter. 3DR at some point very unfriendly refused to share 3D model of this part despite not having ones in stock. I tried to create similarly functional part last night. Enjoy and please post your results.

Using 40% infill with 4 perimeters and PLA filament new arm weight almost 12g more than original one, but PLA is about 20% heavier than ABS, so if curling issues could be solved, potentially part printed fr