The Chopper Compendium

Tubing angle pattern generator you just chose a drop down then input the number of tubes and all the other stuff it wants and it will generate a printable file that you can cut out and tape to the tube. I magic marker then scribe but I suppose if you are brave you could just cut along the edge.
http://dogfeatherdesign.com/ttn_js/

A frame planner Just input the stock dimensions on the left then change what ever you want on the right and watch the numbers change.
https://sebwiers.github.io/motorcycle-f ... r_001.html
Dusty