I edited a few of the dimensions in my earlier posts to clarify what modifications were done.

Don't laugh but the Old Navy flag stem is exactly 3/16" diameter which fits snugly into the pull-off vacuum hose. I drilled a .016" hole about 3/8" of an inch deep, then used a hacksaw to cut the piece off. Ran the drill through again to make sure there weren't any burrs from the saw.
The red arrow shows where the original orifice is, this particular one has a .033" hole which would be way too big for my application.
One of my pull-offs had an ink stamp on it but I don't know what it means.
Also is the drill set and the pin vise to hold the drill.