hi gals and guys- been busy haying- but I have a question-- does anyone know of a book or sheet that talks about the sharpening etc of sickle bar mowers-- used same since I was about 10 but never had to keep them sharp= my grandfather did all that-- now I need info on what needs to be done to keep a mower cutting right--et. most important parts and settings-- I know how to time the section and sharpen it, I think but I know little about the ledger plates, and how good and how sharp they need to be--also how flat to have the bar to cut good--anybody inc. john-- if you know where I can get a book with pictures I would appreciate it thanks..