The Durango factor threw me for a loop as well. But this is the thing, let me re-state my hypothesis after thinking about it for a bit: The AE SC10 4X4 is not too light, but rather it has too high of a relative CG.

As stated by many of the people on here, the weight of the truck is not as close to the ground as it is on the other trucks. This creates excessive body roll with the heavy body and light suspension. The truck's suspension must be run light to generate traction, but with a high relative CG, this makes the truck excessively difficult to control because as the truck leans, the limit of traction is achieved, which causes the suspension to unload under acceleration.

By adding a significant amount of weight low on the chassis, this causes a shift in the relative CG of the truck and it helps it generate the necessary traction and stability. A heavier suspension set-up is needed to get the right chassis balance though.

Making it wider is an interesting approach, but there is only so far you can go. The effect on the relative CG is minimal when compared to the added 3 or 4oz will do. I have made a couple of more revisions to my chassis that I will get to test tomorrow to see if I made any more progress on the chassis development. I will also play with weight in reverse, to see if the set-up can be worked on with a lighter truck.

Lastly, I'll put my plug in here:

The clutch basket is the T*TS! Just BUY ONE and STOP WASTING YOUR TIME trying to run the HD Stuff and vented stuff. Once you have used the basket, it really makes you realize that the FT Stuff and the stock items do not work properly.