That is a clean setup. It should run very well. I don't know about that 9XL on 4S not being powerful enough. I'm running a 9XL on 4S in my 8ight T. I won't say the power is stupid, but it's still fast enough to pull the front wheels if you don't exercise caution with the throttle. Mine is faster than any nitro on the track. I have mine geared 14/46 and it is a wicked tight to medium track setup.