I just put back together a persistence i had apart for a while, I thought i lost one of those copper color washers but i wound up with 6,,i put 3 on each side of the blade,,Maybe there was 4 on one side and 3 on the other i don't know,,When the pivot it tightened to the point of almost no blad play the knife is VERy hard to open...And idea what i can/should do?