After fixing my screw up, the next task was to teach myself how to cut internal thread, single point, in a blind hole... I was fairly happy with the end result. (I do consider them sub-par, but for a self taught first attempt; they came out decent)
finally, I had to drill the connecting airways and the inlet holes in the side of the body
with the exception of external milling and polishing to be determined at a later date, the reg upper portion was complete.