useful software
http://www.midmoracing.com/bendit.htm
NOTE:
Bend It - Frequently Asked Questions
Q - Can I use Bend It with a pipe bender ?
A - No. This program only works with a tubing bender that has a rotating bending shoe (or die). A pipe bender like the one shown above works from the
center of the bend and a tubing bender works from only one one side of the bend.
(no good if you hire a pipe bender like below)