Hi Craig, the Sprint hasn't got these braces and to be honest its something that I haven't really thought about.
Collected the gearbox from BLS Automotive in Lincoln this afternoon.
This is what they replaced/fitted
Bank Rinos (I think it says) x2
Main shaft nut
Rear cover gasket
Selector shaft seal
Used 2nd gear (in good condition)
They showed me the second the gear that they had taken out. It was missing a few teeth so now I should have a better/smoother gear change.
They did have a Sud racer in their workshop which was almost a bare shell with a rollcage and it had been in storage unused for a few years.