*Note*: Chains slip just as easily as belts do. Trust me, we had a kid on the team who just had a knack for breaking things. I know you all do too. Chains are a lot more annoying to reset than belts too, and you can get a nice pair of double sided serpentine belt systems with pulleys of various sizes and tensioners for around two hundred dollars, if you know where to look. See
JEGS.com or
NAPA Auto Stores or go to your nearest auto parts store for more on this subject.
*NOTE*: Regular old toothed gears are a thing of the past. There's a reason that they haven't been used to drive camshafts on car engines since 1935. They get too hot! The friction between two toothed gears with no liquid coolants is immense, enough to melt brass, warp aluminum, and redden steel. If you can cool it, do it. If not, wear gloves.
*NOTE*: V-belts work exceptionally well in a drivetrain, and are a lot cheaper than serpentine belt systems. Use them to change gearing. It's wonderous. A few nice CVT's use V-type belt systems. Audi's comes to mind, as well as GM's and Honda's.
*NOTE*: End of notes.