I know your supposed to switch the pinion gears when running two nimh packs in series but what if you dont? i understand it will probably heat up the motor and esc more than normal but i just want to do a few speed runs with my new street tires. the new tires are a little taller then the stock ones too so i need to consider that too. but say im careful on the throttle and dont floor it to get going but gradually get up to speed for just a few runs will it be ok? or considering the height of the new tires should i just switch them anway?