I have an Oregon 520-120 and have 3 Stihl chain saws, an 021, MS291 and MS391.
Trying to figure out what angle to set the sharpener at for my chains.
The MS391 chains I have are 3652 005 0084 36RM 84. The Stihl USG chart lists A (head tilt) +40°, B (not sure what that is) ±15° and C (table...