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Message:: [QUOTE="messydesk, post: 2683485, member: 1765"]If it were tilted that slightly, you'd never notice anything amiss with the reeds.  If the reeds were tilted (they're not), and they were tilted by 1 degree, that would be unnoticeable.  I'll give a frame of reference.  When I work on photos on my 20" desktop monitor, I'll be looking at a large picture of a slab and notice that the barcode is not level from left to right if it's off by 0.5° or more, but this is over a distance of about 4" on the screen, which makes one end of the barcode just under 1 mm higher than the other, and I've had a good deal of practice.  An unworn reed is 2.4 mm.  If you have a 1° tilt, you'd have one end of a reed be 0.04 mm off, which you would not notice.  In the other direction, since a dollar is 38.1 mm in diameter, a 1° tilt would put part of the coin 0.6 mm -- 25% of its thickness -- out of the collar. But wait, there's more.  That would only tilt the reeds 90° away from the maximal out-of-collar spot (i.e., at 3 and 9 o'clock if the maximal out-of-collar spot is at 12) by 1°.  The only way all of the reeds can be slanted is if the collar is slanted, and the tool used to make the collar dies would not make slanted reeds.[/QUOTE]