Notching Tubing with a Chop Saw
 

http://www.makotenfive.com/videos/chopsaw.wmv

:)

Very nice!

Caution should be used by beginners when free-hand holding stuff in a chop saw though.

for real........ I've already had my nuts blasted by a disk blowing up from too much side load

More than once I have rough cut a tubing notch with a Sawzall or plasma cutter, then finished it out with a 'whizz wheel'.