After playing around with several practice welds, I wanted to see if I could make a PT mounting plate for a trailer hitch.
Here is what I came up with, worked out pretty good. It's made of 3/8" steel for the top, 3/8" for the slots and 1/4" for the bar around the top with a 1/2" rod.
It took me about 4 hours for the first one, but now that I have the template and somewhat know what I am doing, I think I could do it in about an hour and a half.
The pic shows the original PT plate on the right and my home made version on the left. I had no way of bending the bottom locking plate, so I welded it on.