RE: Matrix at the Track day 1 ?'s
dStruct, My Nemi gets a very loving tear down when things start getting caked up. I go thru every component and look for broken or worn parts. just for inbetween bashing I really gauge how gunky it gets but for normal cleaning I use "Simple Green" it will clean your parts to look new and the dirt and oil just melts off on contact, then a light rising under the hose and good stiff blow dry with plenty of compressed air before the red rash gets a chance to start. Compressed air in all the right places, makes huge difference at getting the access water off.
Hope that helps and fun at the track gettin'er dirty!!!