Aluminum tubing internal hex shaft support

We're using a pair of Andymark am-0096a hubs mounted to the sides of 1" aluminum tubing for a throwing arm on our FRC robot and were concerned (probably unnecessarily) about the strength where the bolts go through the tubing, so I put this together. Fits nicely inside 1" tubing with 1/16" walls.

The OpenSCAD file will let you customize to your heart's content!