E-flite ultimate prop selection question?
 

Hi.. I've just finished building my E-Flight Ultimate. I have got a 3S Li-Po on it but have
kept the stock motor and have an FMA ESC. It comes in at just under 12oz.

But I gather that I will burn up the stock motor by using the Li-Po (it's 11.1v)
unless I downsize the prop.

So I've got a GWS 8060 (?) on it right now (I think that's an 8x6, right)? Anyway, should I
use this other the 10x4.7 GWS offers? I expect to kill the stock motor eventually but I want
it to live as long as possible. (Please don't tell me to run out and buy a brushless motor, I'm
constrained by dollars at the moment).

Any advice as to prop selection is quite welcome. I also have a GWS 350C (?) motor that I
can put on the motor (I believe the stock motor uses a D gearbox).

thanks in advance!!