Today I'm trying to focus on t,he strength of the elbow. I printed the original elbow in PLA and then used it to test the strength of my braking setup. Things were going well until *snap*, the joint mount delaminated and I was left with a useless plastic. Since then I've been spinning wheels trying to enhance the part.

All this to say I'm now looking at testing PETG as the elbow. The first test didn't survive first contact with the aluminum bar I'm using as an arm bar. 

The reinforced one I printed also delaminated in the same manner. In frustration I took a break.

I've since developed a collar that will be printed separately and goes around the top of the mount. It is printed perpendicular to the rest of joint and will also have a mount for the velcro straps to hold the arm in place. Now to bake the PETG to work out any water and get to printing.