New to forum and the hobby in general. Converted from RC whirlybirds due to my lack of talent and expense of fixing things after every bad landing!

I have a Challenger 2 from heng long.
Upgraded to steel gearbox and red motors.
In regards to battery voltage, does anyone run higher than the 7.4v?
E.g. 9.6 v ?
I have a TK -6.0 from heng long, which states up to 12v
The reason i ask is I have read sections which state 12V will fry the airsoft motor - so wondering if anyone has run at 9.6V ?
Otherwise, will stick with 7.4 V but get a higher draw rated battery. Space less of an issue now due to moving internals around a bit. Plus the bigger battery will act as a counter weight to the gearbox! Tank tends to drag its rear end around
