
Dismantled the valve stem and removed the F/A tube.
Screwed the valve stem back in with some thread sealer and cut the top off with a Dremel cut off disc.

And drilled and tapped it to accept the 200A valve stem.
I didn't want to mill the bung down to match the height 200A's bung's. I don't want to compromise the strength of the bushing so I may need to make a new frame rest (Collar)

To be continued as it progresses along.
The 275 Franken-lantern tutorial. http://www.tnttt.com/viewtopic.php?f=49&t=57542
Thanks for looking.