OK let me get my mind around this you(OP ) have a Blount manufactured Bar/Chain which you consider (Unfit For Purpose) you return said suspect parts to be told Bar is up to std & quote Chain is the best maintained the Blount guy has had across his desk.The confusing part to me is if the bar was to spec WHy was a replacement offered (Sweetner maybe)Why did you not accept a "Freebie"? looking at the video to me the chain had a number of anomaly's so my take on the best chain he was feeding you BS You are entirely entitled to what ever action you choose but My stand would have been to get Blount to replace FOC bar/chain & then use it & see the results if it turns out it wears as original then you can go to town on Blount for not fit for purpose sales Crap odd bar or chain annoying but "sods law" happens ? 2 the same they have a problem, although it could be a bad batch, but their QC should sort it But if you keep getting offered FOC Bars/chains take them, total cost is some aggravation. All large quantity production concerns have problems be it Auto's, White Goods, whatever but if they repair/replace FOC keep using it's costing you "nowt" extra. Your choice though.