Thanks alot for the info guys, just what I was looking for.
Fully aim to pop to the local club this Sunday when they race and see whats going on.
Shame the Tamiyas dont seem to get much of a look in from my research, would like to go Tamiya route if possible, but not looking likely.
Thats really interesting about the B4.1, I assumed it was an upgraded B4, not a lower end B4?
Thanks alot for the advice thus far