D4 shock pistons

[Chesty]

Does anybody know about the kit pistons in the D4.
They are numbered 1, 2 & 3 - which provide the most & least damping?

I race on a very bumpy track - the car goes great with associated shocks but I would rather use the originals.

It seems 'over-damped' with 30 wt oil & no.3 pistons. The rear especially was all over the place!