"However, to provide clearance for the blade or stop, spacer members 54 a and 54 c (which may be made of a hard plastic material such as ABS or other suitable material) are machined or formed to provide a recess or pocket 68 a, 68 b, 68 c, or 68 d (FIGS. 5 and 6) in those surfaces adjacent one of the stops/blades." . . . .