Today i tested the Porsche GT3 with the 3 carbon plates from PN. At the end of the day i chose the harder. The first two were too soft for my Porsche.
One thing that i will always use is the foam. Maybe it's my impression but with foam the car "sounds" better.
For the first time i stripped the all car to clean the servo gear. In fact, the dnano is really, really small
Nuno