Process for gang cutting rafters. Rack them all top down against the racks, draw parallel lines representing the length of the rafter measured along the bottom of the rafter (which is facing up since they are upside down). Cut the plumb or ridge cut first in case we mess it up, then the level portion of the birdsmouth, then the plumb. Lastly, flop them, scribe the tail and cut, then put them on the forks. . . 58 rafters get handled twice. If we pattern cut, just the pattern would get handled 58x