Hi, for sharpening milling chains does Stihl make a 2 & 1 file for the 3/8 7/32nd ripping chain. I see that Pfred makes a sharpener that is for the 7/32nd but I don't see it listed for Stihl. Stihl does have the 3/8 5.5 mm, is that the same? I have the Oregon ripping chains 3/8 115 DL .063 gauge. Thanks, Terry