I read a post regarding types of belts in drives, and I was considering using 3/8" 0.2 pitch for both steering and driving the modules.
Types of belts thread:
http://www.chiefdelphi.com/forums/sh...ght=belt+pitch
Hmm, for part numbers... how about comparing 1679K19 (urethane) and 6484K219 (neoprene)? They're both 3/8" 0.2 pitch, single sided with trapezoidal teeth, and have an outer circle of 9".