[Chrislong]

It might be your driving style vs the change of chassis to one which is very different? What car did you have before (which you are comparing to)?

The C4.1 does feel to generate a lot of rear side bite to me (which I like). So perhaps try using 0.5° or 1°, or even 1.5° rear hubs on reversed - reducing rear toe-in.... I wouldn't do this for anything but insane high grip carpet racing.

I would also run the car softer, allow the chassis to roll. but as the chassis is narrow, mount some weights either side of the chassis to encourage it to roll more.... need it to roll before braking front traction..