I think the best way to get into this hobby (sport) is to get to grips with things one at a time.
I am new to RC and have been gradually (with the help of some fellow club members) refining my B44 over the weeks to get to grips with how it handles and then upgrading the speed.
Things I have heard about the RTR B4 is the servo is slightly on the slow side, so that isn't going to help. A faster motor might be great for speed, but if you can't control it properly it is just going to mean bigger crashes and more fixing (plus possibly deeper pockets).
I hope to run a B4 soon, and I will over time refine and upgrade it as I go along.
Hope that helps - stick with it mate
