You might want to pick up a copy of Bend Tech... Worth its weight in gold for fabbing one-off cages.
You insert the measurements for each of the areas where you want the cage to fit (inside, outside, or centered to the tube) plus your material dimensions, bender type (center draw, pull through, etc.) and it will calculate the bends, print out the coping sheets for the ends of the tube, and let you add components like connectors, etc., all which will fit perfectly first time.
Directions are printed out -- push in tube X inches, turn X number of degrees and bend to X degrees. Rotate X degrees, push tube X inches, bend to X degrees, etc., etc., etc.
Here's a screen shot of a simple hoop I did -- takes like 30 seconds...
Down tubes:
Go to
www.2020ssi.com for more info.
I'm using Bend Tech Pro -- AWESOME software tool.