An I always thought that the suspension went set up properly would help on any track. The only problem I see in using springs is the bonce factor as I call it where the spring continues to stay in motion without any dampening installed. So I tried some magnets to have the same effect which allows the rear to oscillate from the front and also slide fore and aft. Then the plastic flexibility allows the front wheels to move up and down independently.

It probably won't work like others have said about the suspension but it was fun drawing it up the past three weeks so now its off to print it out and assemble and see what happens.