I've been cutting firewood for a long time, but I've never been great at hand sharpening, so I bought an Oregon Sure Sharp barmounted filing guide the other day from Lowe's. It has the a table with the different angle settings and file sizes for Chain Codes S,H,D,R,J,G, and L. My saw is a Stihl MS-390 with a 16"chain (M/N 33RSC, Drive Link = 60, Gauge = .050", Pitch = 3/8"). Can someone please tell me what chain code my chain falls under or the recommended Filing Angle, Guage, Side Plate Angle, and File Size (dia.) for this chain? Thank you.