About this 3D model

I have need to attach a bar or or tube, securely to the shaft of a motor. I purchased these universal motor mounts from Pololu: http://www.pololu.com/catalog/product/1203 That part gives you a nice solid aluminum chunk with 4 machine screw holes on it. Then I just had to figure out how to utilize that part to connect my carbon fiber tubes. This thing brings the universal mount together with the tube at a 90 degree angle to the shaft. Very good when you're trying to use the motor as the muscle behind a swinging arm. Although this this is very similar to this other thing: http://www.thingiverse.com/thing:6164 It is not strictly a derivative, as it's design is completely different and the only thing they share is the ability to connect a tube to a motor shaft.