Yeah, take the 12 center teeth of the green KIT idler gear, and use that for a spur gear. For the idler gear, take two ZZ/Bit idler gears and shave off the center teeth, and the back of those idler gears so you have two even surfaced idler gear teeth. THEN, glue them together so that they are tooth to tooth. that will be your new idler gear.
for the spur gear above, you may have to drill the center hole out a bit so it fits on the axle. Is that good enough for you???
