A metal line includes a lower metal line formed on a semiconductor substrate. The first and second path each include a rotatable nip assembly, the rotatable nip assembly including a nip drive roll and a nip idler roll positioned so as to define a nip therebetween, the nip serving as a rotatable axis around which the nip drive roll and the nip idler roll rotate to invert the sheet. The amount to be received by each player can be verified to meet minimum and maximum amount requirements. The input to a unused channel may also be used in another circuit given the loop-thru option of the switch.