Hi Tim, the first thing I did when setting up the car was wind on as much castor angle as I could get away with. The tyres just clear the bodywork on full lock/compression/droop. The first time I drove the car there was some self centering which improved as the mileage grew. (I'm back to some now with the new LHD rack but expect it to ease as the rack beds in). The first time I drove it the bump steer was terrible. I got as far as the MOT station and back. At which point I stripped the shocks off and set the rack height to eliminate the bump steer. Easy enough to do but time consuming. And essential if you want to be able to relax, relatively speaking, behind the wheel.
The symptoms of bump steer are finding the the car darts to one side if you hit a pothole or a bump in the road. It can be quite violent and you'll know if you;ve got a problem with it already! I'd be amazed if it hadn't been dialled out at build or by Gary during use.
Guy