The O.D. of this sleeve is .112". The I.D. is .106", that's a .006" clearance, I don't think I did too bad.
I drilled the post out to .113" to accept the .112" sleeve. The rod is a very worn out .106" and measures .1055"
I'm always first to chastise myself about my lathe skills, but I was pretty happy with the how this bushing came out. However, I'm sure the high school kids in the last photo, learning how to use machine lathes at a popular Technical High School in 1944 are currently side-eyeing my pride. But I can only take it one day at a time.
In the meantime, the Side F# on this 1946 Gold Plated Super 20 tenor has absolutely no concentric play, the post was terribly worn out and the rod was slopping around inside it like crazy.
The last photo shows the hinge tube extension I made for the same key, the lateral play was also egregious. But now there is no lateral play either. It's the little things that make a huge difference.