Do you know if there are set programs? I'm hoping they are preprogrammed and you can select which program you want. I'm not interested in creating my own programming. Has your friend run his on track yet? If you're really serious spend the $4-5K on the matching DSC dampers. I'd try the DSC first and if it's still not stiff enough then try the R dampers. The only difference between the dampers that I know of is the "slot gap" is narrower on the R dampers which makes them stiffer throughout their range.