Basically MY "grit" is usually just TSE BOD > Ampeg SVX > whatever compressiong/eq it needs. Basically it's a clean(er) track that's providing the body for the tone. I put a HP at the end of this track anywhere from 200-500, as long as it doesn't interfere with the lows on the sub track.
I bus all 3 of these tracks to one track, set levels between the 3 so I think it sounds good (my distortion track is usually really present.

some like it subtle), then process the main bus to make them all work together as one cohesive unit via staged compression, eq, limiting, ect.
Here's a couple tracks I got of UM doing this:
https://dl.dropbox.com/u/3689406/Stick Stickly Forum - MIX 2 2.mp3
https://dl.dropbox.com/u/3689406/COGNTIVE - 3.mp3