I used two 316 stainless steel 1/2" npt female caps and one 316 stainless steel square head plug.
I took the square head plug and cut the square off with a dremel. than threaded the top with a 1/2" npt die. next I screwed the plug into one female cap than the other cap went on to the plug without the square head. Now I have a genisis body that looks like this:
I took the square head plug and cut the square off with a dremel. than threaded the top with a 1/2" npt die. next I screwed the plug into one female cap than the other cap went on to the plug without the square head. Now I have a genisis body that looks like this: