Onroad guys for sure understand tuning with ballstud washers, offroad maybe not so much. I know I still struggle with that. Mostly because I'm lazy. When I find a setup that works well for me, I rarely change it . LOL.

Tuning roll center is the same as it has always been? I'm going to say yes and no. That was part of why I asked about the different weights of batteries. I know when LiPo's were first being used in TC racing, many racers were adding lead weights to their packs to keep them all at the same weight. I know that was in part because the chassis were still set up for the heavier NiMh/NiCad batteries. Yet adding the weight to the packs made sence to me. That way you knew all the packs would feel the same in the car, and any setup changes would also have the same feeling between packs.

So now with many racers playing with full size and shorty packs, I'm thinking that the roll center needs between the two will be different to get the same "feel". So yes, you're still tuning the same way, but one will not work for the other perfectly. That's my thinking, but maybe I'm way off in that thinking..