Used to to run my XXX4G+ with the following:
Front:
Black spring
40 - 50 wt oil
blue piston #54
Rear:
Red Spring
30wt oil
blue piston # 54
There was also a modification that extended the steering arms, changing the ackerman and using some touring car parts to help straighten out the front hinge pins. Am sure there must be a thread about it on here somewhere.
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