Last year I asked Ray Munday about spring and damping frequency. Seems that its not fully applicable on our scaled cars. His answer below.

"Regarding spring/damping frequency - our vehicles are extremely overdamped so it's not super critical to match spring frequency. Typically our cars run a higher front spring frequency than rear which helps with the rear kicking more off jumps to help with a nose down attitude. But the damping balance is more important as the damper has much bigger forces than the springs. Small changes in hub positions etc are not important, but for major changes (eg going from a standup to laydown transmission) I will change front and rear springs to match the weight bias change (eg for standup I will use softer front spring / firmer rear springs)."
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