Wisdom from Wayne Durkee
Adjusting the Selector Clutch Stop and Release Lever.
Make sure the semi captive plastic nut is in the rangefinder slide, cocked or crooked.
See the below image for Selector Clutch Stop and Drum gap checkpoints.
Is the gap between the drum brake lever (right of the blue gap) and the lever-stop (left of the blue gap) very large? [Ed: Need to inquire with Wayne on the measured gap expectation.] If so, the brake shoes are worn out. Compare to the other main shaft clutches gap.