Rotary Weld Positoner High Torque Upgrade

Although I've had no problem with the somewhat limited amount of torque on my weld positioner, I've had a few users try welding very large pipe sections on theirs without much luck. From the pictures they've sent me, they were trying to weld four 6" (schedule 40?) Tee sections that were all facing the same way. The piece was about as big as the pallet it was laying on. I've been very clear about the lack of torque (which isn't needed when welding round or balanced parts) but I didn't want to give up on helping these guys out. So I tested a stepper motor with a gear reduction box attached to it. See the video for more information on this. Although I have not done extensive testing on this setup, I will update the plans soon to include information about this upgrade.