I want to learn to properly weld a roll cage into a production based racecar. The cage would be contructed of 1.5" OD x .095" wall DOM Steel Tubing.

I will be using my Millermatic 212 with .030" wire and 75/25 argon/co2 mix.

Any tips or suggestion on starting settings for my Millermatic and techniques for welding the cage is much appreciated.