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Old 09-14-2009, 08:34 PM
  #10570  
YmeBP
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Originally Posted by da_John_wee
I made a mod on the drive cups as pictured it s 4/40 or 5/40 set screws about 4mm long. 2 on each side 4 all together that will double the contact surface area. I will try with 13.5 hopley this weekend at Jackson or Regional race at Blue Diamond
Both of those tracks are smooth and the blue diamond is really easy on cars, there is allot of rubber and curved piping around.

I'd say try one of Ray Murry's VTA events. I've run my spool on the parking lots he has his events on and haven't had any issues but that may give you the uneven surface you are looking for as a test.
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