I did a set a while ago Using a sander is a bit easier but Also a lot easier to misshape the spacer You could always get a friend to hold a sander and you rotate the spacer so there's no flat spots And again check fitment after ever other rotation
It's a lengthy process but sand the spacer down .5mm isn't drastic, Don't sand one spot do a semi circle at a time and test fit regularly so you don't take too much off
Hi guys New to lupos but not the vw scene Got some Qs and As But have my self a yellow openair Full leather with heated seats 125k with fvwsh with one owner from new