Outside view of converting round chain to square using a Pferd 3 square file. Filing outside to in, not my favourite job or way of doing it but it works.
Hi, Good work! The tension of the saw chain seems a bit lacking and loose, causing the cutter to move. I think it would be better to tighten the saw chain a little more firmly while sharpening. You could saw chain tensioner and insert the scwrench between the underside of the guidebar and the saw chain.
