G’Day Tony,
well written mate.
I am 64yrs and still love the trill and interest of trying to make an already well engineered car, perform better.
yes it is a notable improvement with the new bush kit, both with crisp sharp steering over the original factory set up.
The new wheel alignment set up will stay in that new position over the factory alignment position as you now have a double offset bush setup.
As for tyre ware, you will have a lot better tyre stance on the road surface, as your tyres thread will sit more flush to the surface of the road.
this performance bush kit gives positive castor on both sides of your car, which in hand gives perfect geometry through your steering.
cheers, mate 👍