Socketed R2D2 Utility Arm

Based on the STL's from WThierry, I printed one of the arms for my Droid.
I found this guy's site just when I got my CNC up, and immediately started making my first droid. His site was immensly helpful in understanding design, CNC, and CAM.
I printed one of the parts from the original STL. It seemed a little short on the middle part, and I can see issues when mounting the claw at the right angle.
I threw the designs into sketchup, and modified the stl's in the following fashion;
Middle