If that o-ring is that fragile maybe they should have included more than 1. I'm thinking of finding the measurements for this and placing an order with the o-ring store.
EDIT: I measure these o-rings at 1.2mm x 10mm. The deck measures at 15.67mm. Anybody got a different size for these? Apparrently, this is an odd size, since the o-ring store doesn't have anything close.. I suppose I could get 1.00x15.
@Pattie, I won't be put off by this. Stuff happens, so its all about the customer service. Worse case, I'll just have to figure out how to drill out 1 of the decks holes to 2.5mm.