Thank you ,
I will try this setup as a basis for a similar track in france .Unfortunaly the grass here in france is very coarse and big (and the dirt is more sort of mini canyons than flat).
I haven't tried my SX3 yet on it but my kyosho zx5 last week had it springs going up and down like a jackhammer on the clods of grass(pretty soft springs)!
In my backyard where I have loads of grass my x12 6.5t motor was running at 70-75° C with a 21teeth pinion and the 83t spur (no timing) still experimenting ...
Jonathan
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