Just to clear things up a bit, this is all theoretical from my end as I don't have a chassis built as yet, just an MX5 front end (to look at wistfully

)
I'm assuming from Andy's pics etc the MX5 rear end seems to be used un-narrowed and thus the rear and front track will be as per MX5.
So I'm then guessing the new front wishbones are longer than stock MX5, (ie the pivots
are closer together than the rusty bits in my garage) so making original rack
inappropriate?
I thought that maybe the reason for using the Escort rack came from the Haynes being an adaptation from the original Locost and its just sorta 'stuck'
What ball joints are you using Andy?
Sorry for so many questions; I'm just trying to understand the geometry changes and rationale behind using certain parts is all.
Cheers