Frame Building Multi-height Tube Stand v1

This simple little tool combines 6 tube blocks in one for use with full scale bike frame tube layout. That's all your standard sizes, with centerline markings, here to help clean up your drafting bench!

Note that it is easy to knock tubes off this little stand so I recommend using multiple stands per tube (not just one at each end). This was designed to be simple enough that it is cheap to print a bunch of them, not to be a robust or attractive tool. This is suitable for drafting table layout for visualization and miter checks, not for clamping. 

More variations and refinements of this idea are in the works. If you have any suggestions, please let me know!