"MrFightGuy" wrote
...
Okay...keep in mind for the rounds, all I need is a 2-inch deep dish
on a 21 - 24 inch piece. HF has a pneumatic planishing hammer that
sells for just over 100 bucks and gets good reviews from customers,
but I don't know if it'll even put a dent in 1/8 inch thick 7075.

If you can't make them, maybe you can buy them as tank heads (or
rejects):
http://www.bakertankhead.com/products/tank-heads.htm
http://www.cmforming.com/tankheads-s...d-non-code.htm

jsw