I don't know exactly what you have to do, but if the opportunity exists, you might want to try a test cut with whatever you choose to cut with before making the money cut. So, for example, if you have to cut off six inches try cutting off two inches first just to get a feel for how it works. I read a long time ago that, "Nothing focusses your attention as much as making the first cut in a $400 piece of material.".