ok. I'm not perfect.
:-)
When my right tires go off (left side F/37, R/40, right side F/40, R/42) then car was like this\ so spur always grab ground.
I start from 64rears 61.8 fronts.
Tires goes off that R side was 1-1.5mm smaller on diameter then L side.
Anyway, if I will stay with 733 just for fun, I will move up that gear shaft 1.5mm, just add hand made allu washers.
Regards!
m.
ps: velox ordered.