got the rest of receiver put together. it went together pretty easy. there was a large gap on one side so i had to add a filler piece. first thing i did was to cut a piece of metal to fit in the dove tail for folding stock. i put it in and welded it in on both sides.
be careful if you do it this way. i should have cut it a little short so it lined up w/ the 2 thick ribs on the inside, rear of receiver. putting the welds on the outside corners where the metal is extremely thin almost caused a burn through into channel that the sheet metal upper sits in. would have been a pain to clean it up.
i did not weld the top of the hole for the safety lever/selector yet as i didn't have a brass rod to use as a backing plate.
i have to clean up selector hole and decide if i need to put in holes for hammer stop pin. i've seen builds both ways. anyone know what would be wrong w/ leaving it out? then i can insert internals and see what else i need to clean up inside receiver.