hi guys, I need to get a hand sharpener. I'm new at this and have never sharpened a chain before. my saw is a 372xp with 20" and 24" bars. I was on Baileys website and was looking at the Granberg file -n -joint part #15200 and I was also looking at the Pferd filing guide part #17049 . what do you guys think? I dont know what one to get. thanks for any suggestions or any help you guys can give.