You should be good to go with that....my first brushless system was the Etronix with 10t motor and it was pretty good.. I think that the B4.1 is a good car..just make sure you have good tyres..preferably Schumacher yellow mini spikes on the back and stagger ribs on the front..also works best with silver springs all round..
Can't be there this Sunday but will be there the following Sunday if you need any help..
Drive carefully.!