Si,
At chadderton just gone i was running some Yokomo tappered pistons 6 hole 1.1mm front 40wt and rear 6 hole by 1.2mm (nick gurnels) 30wt and the car was good..
Springs im finding the front end needs to be alot stiffer so i use the Yokomo Green (4.2lb) or Orange (5.25lb) front, at the rear i always end up on Kyosho Red.
The hardest Kyosho is equililent to the softest Yokomo!
Yokomo goes. Pink, Green, Orange, Black, Purple...
http://www.petitrc.com/reglages/BuggyBigBoreSpring.pdf
Just to make sure.. you have dremelled a ridge in your front arms?? and youve also put an angle on your ball ends to stop them catching the front gearbox on full lock?? (this wont be a problem though if your running the E SPeed ackermann mod...)
Any probs give me a shout.. may be at Broxtowe Sunday running SC
