I've an older 806 D2. I've noticed that with repeated opening and closing, blade play developes. This is no surprise and I just tighten the pivot screw. I've recently noticed that blade play comes very quickly after opening closing. Quickly as in about 2 minutes of flicking after severe tightening. To give some idea, I tighten the pivot screw to a point where flicking the blade out requires a strong flick. However, after about two minutes of flicking, opening/ closing, the blade flicks open with a very light swing and the pivot screw needs to be turned again. Does anyone know if this is indicative of anything broken such as a damaged omega spring? Any suggestions as to what I may do to alleviate this? Any info is greatly appreciated