scopestuff collimation thumbscrew kit for meade lx90 gps 12"

[eye in the sky]

hi all

I got myself a collimation thumbscrew kit from scopestuff for my meade lx90 gps a while back. I went to fit them the other day and the instructions state that you have to leave the little nylon washers on them. The problem that ive got is the original allen head screws that you use to collimate the scope with are the same length as the scopestuff ones and the nylon spacers are about 1.5mm making the scopestuff screws 1.5mm shorter than the originals. Should i leave off the washers or is there a reason why they should be on there as the instructions state they should be on. Please could someone with some knowledge of these scopes and collimation screws please advise me on what to do.

regards

dave w