One day I'm gong to figure out why everyone's so resistant to that. I had a guy building a GRM challenge car that asked me to co-drive with him to help him dial the car in. No problem. We went for 3 of our runs each, every time we'd come back and I'd say "this thing is oversteering like *crazy*, you REALLY should try it with the rear sway disconnected." After the 3, he finally tried it and we disconnected 1 of the end links in grid. Instantly dropped seconds, because we weren't chasing the tail around the entire course. It takes a little more setup to get it dialed in without the rear sway, but just disconnecting it makes a HUGE difference.