I run an SC10 on an outdoor sandy clayish track that is quite often dry, dusty, and quite slick. My SC10 handles much better with a higher rear roll center (short link, low inner link mounting). I've gone as far as shaving the u-brace and then recessing the mount location an additional 1/32" with my router table. I use the inner hub link mounting hole with the RTR hub. My thinking is that this setup resists the chassis roll and the force resisting that roll loads up the outside rear tire. Fred mentioned many posts ago towards the beginning of this thread that the higher roll center will break free more violently, but on this track, the thing is sliding around anyway, so I just try to maximize the traction all the time by using the higher roll center and loading up the outside rear tire.

Now, I ran at a different track a few times last summer, too. This one was very different in that it was a blue groove track with more hairpin turns (where the track mentioned above is not quite as technical). This setup was difficult to drive here due to the fact that the truck was too responsive and twitchy (plus, I'm not that good of a driver). Traction was acceptable up to a point, and then would suddenly let go. I had lowered the rear roll center a bit to try and adjust for the different track surface/layout, but not enough.