Funny story involving a Dolmar PS-510 with the Dolmar branded 20" K095 bar a few years ago. Had a new saw on the shelf and had sold one to a customer and he was having issues with oil hole on the bar clogging. With some investigation found that the oil hole had been machined .140 too low and was obstructing half the hole. Called my distributor and talked to the tech and explained what I had and what was happening. After he followed my issue and started measuring bars in inventory found that all the bars of that mount and length were made incorrectly. All 8000 bars in stock.