If you ever have to fishmouth tubing and don't have the exotic tools, this little program will lay the cut out for you. You simply input the data it asks for, and it will print out a template that you cut out and wrap around the tube. Trace the pattern, then cut the tube on the line. If you cut carefully, it makes perfect fishmouths.

You can download it here.

http://www.members.cox.net/otb_vigilante/tubemiter.exe

Guranteed virus free.

Or, you can Google "tubemiter.exe" and download it from a dozen other places.

This has probably been posted here before, but I haven't seen it.