[40 Deluxe]

dude, If you stand them on end, almost all the weight is pushing down on that last crank throw, right? And there's no support at the centerline of the crank, right? So eventually the crank will bend and maybe topple over, even! Whereas, if the crank is lying on the floor it is being supported at least in three or four places, thus spreading the weight out instead of all being focused at one point if it were standing on end!