Thanks for the info, I see what you are doing.
The wheels I got for the car are:
F: 17x7.5 et40. Thats is 4mm further out then stock (should clear calipers).
R: 18x7.5 et40. Thats is -2mm, further recessed then stock in rear, may catch calipers without spacer.
I suppose to equal it out to factory geometry, I could do some combination of:
a) add 6mm spacer on the rears only.
b) add 3mm spacer on front and 10mm spacer on rear.
Will mount tires before finalizing the offset with shims. I don’t want to use spacers where not required, so option (a) seems like the option I will go with.