It seems that I have to get some additional spring sets....

I feels just wrong to use softer springs at the heavier end of the car, but you never know, and according to the tamiya mini thread this seems to be the setup many people recommend for he M05 Pro V2, which has a similiar weight distribution.

What I really like about the abc is that it is so unusual with its kingpin/MacPherson-strut-like suspension. This made it a more approbiate replacement for my (slightly weird) M-02 than an M-03 or 05.