Here's the setup I used at the ETS. Think that Andy's was quite the same, despite the chassis.

I would like to know if the HB drivers use drill a hole in the cap of the shock, to improve the performance of carpet racing...It's a better solution?
At the last ETS in Italy, Andy, me (Dominik Fleischmann) and ProStock winner Steffen Leinburger did use caps without a hole. I thought that traction was a little bit better, car was easier to drive and I still didn't have any issues with traction rolling. So in this case, it was better without the hole.

Greets
Dominik

PDF File

Andy Moore's car