RE: Hyper 7 Set up for slipery surface ??
You'll want to thicken up your middle and rear diff fluids, probably moreso the middle than rear.
As a starting point I'd try 7000/10000/4000 or so.
Is it dusty as in dust on a concrete floor or dusty as in just loose dirt. If it's the latter, it sounds like my track and for me I have been running 7000/7000/3000 but my driving style isn't whip it around, it feels like it's on rails more than loose, but if you get stupid with the throttle it will spin if you want.