Never installed one, but by the looks of it, the wedge fits between the underside of the fork crown and the rubber washer itself, thin side forward so as to reduce the squished/not-very-compressed effect (to borrow from their technical parlance) on the washer. It's not meant to replace the washer itself.
Apologies if this was obvious, but it's all I've got! Jeff Hagedorn Warragul, VIC Australia -- You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. To unsubscribe from this group and stop receiving emails from it, send an email to rbw-owners-bunch+unsubscr...@googlegroups.com. To post to this group, send email to rbw-owners-bunch@googlegroups.com. Visit this group at http://groups.google.com/group/rbw-owners-bunch?hl=en. For more options, visit https://groups.google.com/groups/opt_out.