@STU, i have the full abarth kit (but not the rear, i have a reger rear apron) and i am lowerd 35mm, i never get any rubbing over speed bumps and the car looks loads better when it is lowered! I only ever catch my rear bumper (which you dont have) and that is only on the speed bump at my Tescos which is REALLY BIG, its stupid, i have to drive over it at snail pace!
@DAN, my prject is nearly complete, i promise i will eventually get you some pictures!
Paul R