Looking at the ratio numbers it would appear the belt would be pretty much like haveing an 18t front sprocket.
It is just a ton of money for a few pulleys and a belt. Seems to me if we had any machinist on the site those things could be made for a fraction of that retail cost. Then again I am just rambling. I would think the rear and front sprokets could be a template for the interior of the pulley so it would be bolt and go operation.
/end of junkpost :-)