Thanks guys,
I got a little bit done over the weekend. Didn't have a lot of shop time but I did take advantage when I could...
Got the notcher fired up and ran the lower crossmembers through it. It took about half an hour to get the jigs set up and another half hour to run the tubing through.
I use Castrol wax lubricant on the hole saw.
This stuff works really well and doesn't make the mess that WD-40 or cutting fluid does. It also cleans up easily. I can do one notch in about 30 seconds running the notcher with my 1/2" Milwaukee drill.
This set up makes for a clean cut and, with a little clean up with the angle grinder, I have some quality notches that fit well for Tig welding.
Thanks for looking.
Mark