pedal washers - what size and cheap-ish way to get them?
So I took my bike in a not-so-local bike shop to change to flat pedals in a pinch(clipless shoe broke), and the mechanic there told me that there should be pedal washers on my crank(FSA Omega compact) since there's an indent around the pedal threads on the crank arm. The question is: 1) are they necessary? 2)what size should I get? Searched ebay/amazon and found only 1 FSA branded washer, but they charge around $4 - FOR A WASHER. so 3) is there a cheaper way to get it? It's after all a washer...