Mike,
Your efforts are certainly impressive on this.
There is no wick down the oil hole in early drip feed machines!
Earliest countershaft/clutches ran on needle roller bearings and that is how you have picked up on the noise aspect. Yours clearly has had the bushes retrofitted at a date after manufacture. It was a Myford offer for all the early machines which became noisy; but not a free offer. A noisy countershaft would still work fine with no noticeable play, but sounded awful.
Dennis