I've driven a 4.1 vega before Gaz and despite what people say about the kyosho being best i think with a little set-up work from Mcgee the 4.1 will easily be as good as any of the others. Weight wise in the 4.1 i'm not sure but i've always ran full rudebits weightkit in my rb5 vega as i found when i ran the same weight as kev lee and the like used to run the car was no faster than with the full weight kit it just felt like it wanted to roll over all the time. So i'd ask around but i think weight kit will be a good start. Also i've been running the twin track in the diff since the beginning of silverstone national and it seems super smooth and should make the diff plates last longer!
