I have 3 planes that I am trying to fet into shape. A Stanley 12-220, one is marked C-255. I think that it is a Stanley as it has the sweetheart symbol on the blade. The last is what I think is a Bluegrass Belknap 107-16. What I would like to know is the angle for sharpening the blades. Also would like to know if the C-255 is a Stanley or if it got rebladed. I googled c-255 and didn't come up with much. Thank you for your time on this.