I have question for the experienced felows on here regarging bar oiler holes, when in l run squre chisel seems like i get about i0 cuts and the bar oil hole plugs with fine dust and wil quit oiling, have a i6" oregon power match bar that actually shoved the fines all the way into the oil tube, also have a raisman bar that did the same thing, but i took a small cut of wheel and angled the oil slot towads the tip of the bar seems to have that fixed, it doesn't do that with round fille chains, any thoughts.