Today I tackled my demons and decided to attach the arms to the A&A frame. Attaching the legs seemed intimidating to me. These fiber (mdf?)arms were not exactly correct for the A&A (the holes) so I used 5/16 instead of 1/2" bolts so the holes fit in the diameter of the arms.
Everything worked great first time .... well almost first time but I just had to turn around one part I installed backwards on the A&A frame.
So to fuel my R2 enthusiasm I popped the resin (temporary) dome on him and set a few resin parts in the frame. With his legs .... I can actually see a droid sitting on the bench. And that's what fuels enthusiasm. Keeping the enthusiasm strong allows the build to go a lot smoother and quicker.