Tim, I run on a Very smooth asphalt track that is I think 140x70 I just got a Mazda 6 body and it runs great (more steering than stratus 2.0 but still just as planted). If you are talking about running the x-ray on carpet it will be awsome, that thing is as stiff as a rock (and i mean that!!
) which makes the suspension more predictable and to me smoother to drive.
Maybe after you get it you can post your setup up b/c this is going my first year with an x-ray on foams at the snowbirds and I will probably need a starting point.