2:1 Nylon Gear Reduction, Maintaining Belt Path

As the 2BEIGH3 Printer is a large unit, there are times when I want to take advantage of very small nozzle sizes. To do so, I designed a 2:1 gear reduction system that uses the standard mounting holes.
A second requirement was to maintain the belt path. To accomplish this, two idlers are used.
The Belt System for the 2BEIGH3 is the XL 3/8" .200" style.
Operation is best demonstrated in a video:
https://www.youtube.com/watch?v=pD0TGcQcKG0&feature=plcp