Ha. I did that to two T-35 units. His method of replacing the cord wasn't as clean as it should have been.
As he said in the video, the nichrome wire to the splice crimps to the cord is at an absolute premium for length. The crimps he used were not the right kind. I got the correct high-temperature, no insulation style from Digi-Key.
The real trick is how to get the old crimps off. In this case I used a Dremel grinder with a thin cutoff disk. I cut through the crimp longitudinally, checking to make sure I didn't cut into the nichrome wire. Once the crimp has a slot along its length, twisting a screwdriver will split the old crimp open enough to let it slip off the wire.
I then was able to use one of those surround type crimpers to put the new crimp on the nichrome wire. However, this of course won't work with the new cord end. For that I used a regular crimping tool
I also grounded them, figuring that they would more than likely be on GFCI circuits, and there was no way to double insulate it.
Tuning the thermal motor comes down to 1/16 turn adjustments at a time. It's very sensitive.
Tuning the heat control may be necessary due to aging and relaxation of various parts. With the bottom case off, the heat control can be adjusted over several turns to get it into nominal, allowing for +/- 1/4 turn once it's assembled.