XRAY - Model racing cars

I'm impatient, and just wanted to get some feedback from anyone that has run one with an RB TM928 in it...I'm used to my XB8 with an RB S5, which I have to say is quite a quick car. Am I going to be overwhelmed by the power of the 928? Or is it quite easy to handle (I race an XB8 and an NT1, so I'm quite used to snappy power (from the RB matrix in the NT1, rather than the S5)?

Any opinions or feedback or general comments on how this combo will be would be most welcome. Also if someone could suggest a suitable pinion for this motor. I was thinking 14 or 15?? Want a fair bit of top end... Thanks guys

Oh, yeh, PS... Is it gonna be a fuel guzzler? How long a runtime do you think I'll be lookig at...thanks again.

Well! That was sooner than expected! I have it!! Yay...

In the end I went for the TM728 instead, I decided the 928 might be a bit too much. Still after a gearing recommendation for this beastie. Thanks...