My basket case nears completion (at least the noisy bit) ! From my box of bits I have a plain steel spacer (no marks or grooves) that is 3/8" thick however I am not sure if this is from the bike as there were 3 other bike spares mixed in. On tightening the mainshaft nut with this spacer the springs appear fairly close to coilbound and the nut threads are approx 50% utilized. All other associated components are correct and the sprocket aligns with the old chain wear marks in the chaincase. Can anybody advise spacer dimensions and or confirm the above as normal?