Birchy just noticed you had said that Miller were the Aston Martin of the welding world. That might be but I have never looked at them much. I do remember having to go to a customer years ago who complained that his profiling machine kept on losing position. Arrived at his site to find the machine stuck between two syncrowelds. Everytime they fired up they chucked out so much rf they blasted the cnc controller senseless and it went wandering. Right PITA to fix it was.