Good move with the tyres, What you want to do is fit 1.5 degree bottom arms,
this is a sensible amount for a car that will spend most of its life on the
road.  While you're fitting them you should fit a set of uprated tie bars,
not forgetting poly bushes for both lower arms either.  The tie bars will
help steady the car enormously under heavy braking.  A set of decent dampers
wouldn't go ammiss either - I prefer Spax adjustables but some people find
them a bit too stiff even on lower settings.  With my 1.3MPi, I fitted
HiLo's to the back only and set the ride height to make the car sit level.
I did fit rear camber brackets but removed them as I found I got horrendous
rear tyre wear with them - not good when you do 8000miles a year!  Apart
from regular greasing of the nipples there wasn't much else worth doing.

If anything the 1.5 deg bottom arms made the car easier to steer at parking
speeds aswell!?  While fitting HiLo's, if you do, it cant hurt to pop in new
knuckle joints aswell - even on a newer MPi car.  My prefered retailer for
most of these bits was minispares.  I bought a set of uprated tie bars for a
friend from a trader at a mini show, didn't realise till we got home that
the thread for the really big nut on the front was a really obscure pattern.
Took ages to get the right nuts for them!

HTH

Chris

Since you have the tracking measurement equipment, measure the current
settings on the car. Then get the negative castor arms you need to
make the two sides equal. Minis seldom are the same side to side from
the factory. Vizard recommends 1.5 degree negative arms. Since the
Mini usually comes from the factory with 1 degree positive camber this
means you should be shooting for a final measure of 0.5 degrees
negative camber.

If you plan on lowering the car, lower it first with the standard
lower arm and then measure the initial camber. Lowering the car
increases negative camber.

Cheers

Kelley