The Natural Philosopher writes:

Bill wrote:
My local friendly trailer man can do the welding but isn't
happy about making the 2" hole in the 1/4" steel plate.

Isn't a 2" hole in 1/4" steel plate exactly the sort of
thing a hypersonic depleted uranium round is supposed to
make?

Easier to get the hole in the right place like this:
http://www.youtube.com/watch?v=fce0vxVR4oo

--
Jón Fairbairn