A place I used to work at had a BIG old Grob band saw with a built in blade welder so we would make our own blades. So the FNG that "knew" how to do it made a blade with the welded ends opposite each other (teeth on one side on one side of the weld, teeth on the back side on the other side of the weld so the blade ended up a Mobius strip!). So I said (after the WTF moment) "we can cut the weld and re-weld it" since there was about 2-3 inches of adjustment. So I cut the weld, clean the ends and sure enough, he cut it 6 inches short. BTW, he was fired 4 months later.