You guy sound like Al Gore and global warming, in that he stretched he truth to make a point. Ifits that bad cut it in half and us it elsewhere, re saw it, hew it straight, or something. But lets not make this more dificult than it needs to be. Square rule is simple. If your timbers are that wanky, scribe, or have them resawn. With that all said, If I have to snap lines for lay out, my line represents one side of the mortice, no need to recalculate off a center line or some other number. You can still plumb and level on the ends with lines that are not centered. I also only snap lines I need, if no joints on the other three sides, no lines. Tim
