[cas3]

Sometimes, like in this case, I will drill a hole in a piece of flat stock, like 1/8 thick, x 1" wide, long enough for that to be the handle instead of a nut and a wrench. I believe the cad plating on the nut goofs up the weld, and this way when you drill a hole thru thinner material its an easier target to weld. I agree, getting another backing plate may be best if you're not in a hurry. I may have one...not sure what I have left after my recent auction. I'll look tomorrow.