Summary PS: MY LAST UPDATE IS IN MY REMIX PAGE http://www.thingiverse.com/thing:1940102 http://www.thingiverse.com/thing:2004357 https://www.youtube.com/watch?v=rsMGWo9yh1g https://www.youtube.com/watch?v=509oGA5uQD0 https://www.youtube.com/watch?v=pfA0y7ZANno https://www.youtube.com/watch?v=vCuVzhc6LwY https://www.youtube.com/watch?v=FRNenJAj5Xg This is only an idea of making fordable drone like DJI MAVIC... feel free to use and edit it... i use a spring for snapping mechanism on folding arm... If u like this 3D project, please kindly vote my instructables... :) http://www.instructables.com/id/Printable-Foldable-Quadcopter-DJI-Mavic-Clone-Fram/ New update, edit the lock mechanism... Print Settings Printer Brand: RepRap Printer: i3 Rafts: Doesn't Matter Supports: Yes Resolution: 0,2mm Infill: 50% Notes: using PLA with 0,3 nozzle extruder, low speed at 170 degree hot end will make my model stronger...