36.9 mm wide
edge to center of hole 8mm
hole diameter 2mm
striated section to secure gear 7mm wide
striated section begins 5mm in from edge
side near hole is threaded for #6 x 1/4 screw
side with striation is "threaded" for bowden cable (MIP bowden cable is ~ 3mm x 3mm (1/8 x 1/8)

(threading the hole to accomodate a bowden cable is tricky, Pat D suggested drilling a hole slightly larger, press fitting and securing square brass rod w loctite 680 into the larger hole)