Mardave 1/12th CE circuit car 13.5 help ????

[Vinster]

Got my self a mardave 1/12th CE circuit car

Im running the Fusion Exceed Sport esc with aformentioned 13.5

Im using the 70mm spur and 25 pinion with 50mm tyres this gives a rollout of 57 mm , on my 1/12th pan car I would expect to run approx 72mm rollout so would need a 31 tooth pinion does that sound right to you.
I have no experience with the Mardave also looking for some guidane on the Esc settings.

Can any one give some guidance advice with any of the above.