Run paralells through till you get close to the thickness you, say within .010. Then flip the lam end to end and run it through. Flip it after each pass and don't tighten the fence any till after you have made a few passes. Check your thickness after each pass. To do a tapered lam just lay your lam to be grinded face to face with a pretapered lam and do the same thing. You will have to get a tapered lam to start with, but you will only need the one. I suggest getting it from Kenny M.