Have a look at page 159 in the book and it gives pro's and con's to using anti roll bars and the effect on steering and under/oversteer along with damper,tyre settings etc.
I must agree with HandyAndy after being in and now having driven Spud's Roadster it handles like a kart (all credit to the builder and attention to detail and setup,absolutely magic! If you want Roadster parts these are the boys.)
Experimentation is the only way to find out unless someone has the software to do it and it will be interesting to see the outcome.
And it is the nut behind the wheel, not the nut holding it on that is the cause of all the problems
Good luck.