Hi Everyone, I am looking at printing a AR3 arm. I am wanting to print it so the initial investment is a bit lower and if I find that I am using it, I will then get the aluminium kits. What I am wanting to know is what the strength limitations are if you print the arms? Does using more exotic filaments such as CF impregnated nylons help? Kind Regards, Sam

Hi I wonder why the set screws for J2 bearings are only on one side (tension ring) and not the other as well. They're meant for stopping play in J2 bearings, but don't these 4 M4x5 set screws stop play only in the left bearing and not the right? What stops play in the right J2 bearing? Thanks

First of all: thank you so much for this wonderful project! I have tried for weeks to remove the key from the J1 motor shaft using locking pliers, as described in the AR3 manual. I was able to get a good grip, but it. does. not. budge. � � I have then tried to remove it using a cold chisel. I've chipped a corner of the key off, but it does not move at all even when hammered with the chisel. Any ideas on what to do? Do you know if stepperonline has maybe changed their product recently?