I dont mind answering your questions. Unfortunately the Kyosho cup series is no longer with us. I raced two of them, both on carpet. However the big race in California at RCX was on an RCP track. We (our club members) have all raced 1/10th scale electric and really believe the carpet gives us the same feel and driveablility one comes to expect from high quality indoor car racing. Don't get me wrong, RCP is very nice and extremely popular, but in my humble opinion, it does not compare to carpet. Fresh asphalt would also work for a mini track as long as you blew it off, and you may have to sugar water it. IamZ is the Iternational Mini Z Racing Association. It will provide guidelines and oversea mini racing on a global level. It will also crown a world champion. I will provide you the details.