One of the problems where I work is that there a a order every year of about 50 pieces that need a notch cut out in a battery terminal boot at 30 degrees from top center. A temporary solution was put in place but that idea made it difficult to get the accurate 30 degrees. Here is what i made in order to make sure the notch is in the same place every time:







Im pleased with the weld quality for a crappy welder.

Here is what the boot is similar to:


and the long end of the boot would go on the little notch of as seen in the second picture and the large opening goes over where the punch is used.