I am ok with the stiff chassis option, which I have never done, but might try this time. As for all NSR parts being legal replacements, I was not considering the stiff chassis or any changes Marty suggested above. No changes would be my preference, but if anyone has noticed improvement with the stiff chassis let us know now. I do not know if I could drive a car any faster then the speed of the box stock car with any clean up to the stock parts. If anyone makes modifications with NSR parts, I want the changes noted for public display including part numbers, before the races start. Thank you for your support!. (Bartles and Jaymes wine coolers)