Checkering is tedious work. It's not something you pick up and do a good job of overnight. Symmetry in layout is important. Dimensions are important.Good sharp tools are important. If you are really serious about trying this, I would highly recommend you get a used stock and do some experimenting on before you wade in on one of your guns. It definitely requires getting a "feel" for the work. A checkering cradle helps greatly too, along with a good book describing the process. It also helps to have good eyesight and magnifying glasses or a magnifying head piece, and a well-lit work area...