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First photo shows the final 2nd gear synchro assembly.

Cleaned out the case and re-attached the magnet with JB weld.

Next project: the main shaft needle bearing surface has some deep pitting in it.
Figured I'd see if I can repair it with a needle bearing bushing, as supplied by SKF (IR series)
These are meant for needle bearings without an inner ring in combination with a shaft that is not hardened.

Since the SM420 needle bearing surface is a very odd size, which is not available, I had to reduce the diameter of the bushing to the required size.
I first tried to turn the bushing with the CBN insert and check for through hardening. It passed the test.

Indicated the main shaft in the lathe between centers. Turned down the bearing surface with a CBN insert. Allowed for .0005" press fit and pressed on the bushing with some additional Loctite 648.

The main shaft was re-indicated between centers and turned and ground to size. The last picture shows the final product (I used the steady rest to face off the bushing.