KAD own design selector fork shaft.
The standard items can be known to snap through the scroll pin drilling. Ours does not have this and uses a c-clip to retain the shaft in the gearbox casing. So far resulting in 100% reliability record.
4 speed shaft has 3 grooves to choose to minimise shaft movement.
5 speed selector forks require shimming to remove overthrow, a different shaft is required.