[sambo]

OK, is that recommendation of 2 deg caster for a power assisted rack? Non-assisted steering seems to go with 2 deg, from my research.

Is that 2mm toe in per side or total?

I guess we have a couple of options: increase rolling resistance by a) dialling in heaps of toe, b) deflating the tyres. Or use caster to help the wheel self-centre. After a bit of toe-in I think I'll go with caster.

I've located some perspex and will make up those alignment plates tomorrow.