Just to make you feel better, I am running:

19 X 8.5" 35 mm Offset front wheels, 235/35 X 19" 10 mm spacer (25 mm effective offset)

20 X 9.5" 35 mm Offset rear wheels, 275/30 X 20 15 mm spacer (20 mm effective offset)

Eibach Sport springs, Adjustable rear arms (I made them )

Doing the math (crayon and matchbook time!)

You'll need 20/25 mm spacers in front to make it like mine (23/18 mm effective offset).

You'll need 20/25 mm spacers in back to make it like mine. (23/18 mm effective offset).

You adjust/massage the spacer thicknesses, but I think they come in 5 mm increments.

Mount the tires-Measuring the wheels hanging in space really doesn't help. The suspension swings out a bit in extension.

What you have should work with correct spacing. My rears were tucked in a bit before lowering-now they're as close to flush as possible. Check my gallery.