The adjuster rings are rubbing in your tyres? You're still driving it???
Surely when you go over bumps/potholes the adjuster rings would then whack the wheel?
Sounds like a good setup you've got

Each coilover varies slightly on dimension and design, I had fk highsports with the same setup as my current (but now with Apex rdx coils) it rubbed on the Apex coils even with 8mm spacers (19x8.5j, 215/35 tyres), but wound it up a tad so the adjusters were out of the way and has been fine since. The inner lip o the rim was rubbing by about 2mm on the adjuster. Sounded awful!
I you're catching your tyre then you'd need something more like a 15mm spacer! Can you get any pics up? I pretty much thought the same as slix in that the dimensions/spacings don't change (unless you've got knackered bushes or something's not done up correctly!)