e revo progress

just a quick update, got charger and ordered body(jconcepts) and ext. rear arms (tekno) and ordered batterys( maxamps 7.4v 5000mah x 2) will test asap and let you guys know how it works out..

one quick ? though, i cant seem to figure out the final drive gear ratio when compared to the emaxx, diffs are the same and i think the close ratio 2nd gear is the same as the emaxx, but how can i figure out my gearing , just check the emaxx recomended ratio and then try to match it? i am running 15/40, thanks for any help