.125” tick 3.5” diameter aluminum tube welded to billet driveshaft yoke 250 amps with foot pedal 30% EP AC balance 120 HZ 3/32 5356 aluminum filler rod 3/32 Lanthanated tungsten #7 cup at 20 cfh Scotch brited and acetone wiped before welding along with filler rod Could have used bigger bevels to make it look nicer.