9920/8L questions and more

[macfjej]

thanks all for all the info, if it isn't completely obvious i'm just begining to learn everything there is to know about brushless, i have just a few more questions before i make my order so that everything has been made clear

13.
two gearings for 9920/9L, one the regular gearing for max speed, and the other (if this is possible) to match a stock e-maxx, so about 29-30mph (14c), though i don't know if it willmatch for 12 cells as well. my GF decided to make the better of two choices and pay back some money she owes instead of getting a brushless setup this year, and i feel it would be easier to change the pinion/spur then to change the whole powerhouse

14.
do these require any sort of pinion puller? or just loosen the locking screw and take them off

15.a)
just to be sure, a 9L shouldn't have any problems with it's 1/8" shaft twisting should it? or do i need to get the 5mm shaft verion
b)
which comes with the combo? or do i need to specify

16. do you sell somesort of"plug" for the gaping whole where the other motor should be?

17.
is the 9920 computer programmable? does it need to be programed via computer?


again , thank you guys for all the help, it really is apreciated