here are three links to some pipe notching software that I found today,, so if anyone does and fabbing work at home ,they may be of use
this one is a web based script
www.metalgeek.com/static/cope.pcgi
this one is a shareware program that allows you to print out a templete to paste to the pipe to act as a guide
home.tallships.ca/mspencer/winmiter.html
this one is another software package
www.ezpipe.com/
keep it for a rainy day