When you raise he inner ball stud, you lower the roll center. Now, we have to keep in mind that this is the static roll center. The actual roll center is constantly changing with chassis movement. The probl---err difficulty with this truck is that the cog and rc ratios front to rear are wacked. Early on I noticed the truck would corner with the rear rolling too much and the front too little. I raised the front inner ballstud 5mm, but how to lower the rear ballstud?? I chose to raise the outer ballstud instead. This fixed the rear roll center. I used the carbon fiber risers for the b4,t4. The rise was a little too much though. We need a rear hub carrier that has either a verticle ballstud, or a taller mounting point. Probably only 1-2mm would do.
With the raised outer stud, all hint of snap roll was gone!! The issue was the camber gain the truck then had in the rear. I needed more range of adjustment for link length.

I wish Marcus or STRC made a different rear hub carrier. hint hint.