Suggest print with 3 perimeters to maximize endurance or use full infill. Hi, a simple upgrade for my old diy camera arm with a coupling retainer, 6° step .. :) Assembly video - If you think to buy from Gearbest and want support me, use my affiliate link, thanks https://www.gearbest.com/?lkid... If you want to make a donation, you can use thingiverse tip, thanks https://www.thingiverse.com/Sg... Check me out at: Youtube https://www.youtube.com/SgaboL... Instagram http://www.instagram.com/sgabo... Google+ https://plus.google.com/+Sgabo... Blogger http://www.sgabolab.com/ Pinshape Shop https://pinshape.com/users/130...