Jon, a parallel guide doesn't help with ripping material longer than the wagon. What folks use for that would be a sled that runs in the slot that's typically on the top of a slider's wagon so that you get the full throw of the slider plus the extra length that the sled gives using the slot as a guide. This is quite often how folks with a short slider will process material longer than they can with just the wagon alone.
Parallel guides, on the other hand, including the so-called "Fritz and Franz" jigs work best with material shorter than the wagon. You get the benefit of the precise cut that comes with moving the material through the blade in an extremely stable way...something that's pretty impossible to do with one's hands pushing a board along a fence where small variations in hand pressure, etc., affect the cutting precision.
Last edited by Jim Becker; 05-09-2018 at 2:13 PM.
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The most expensive tool is the one you buy "cheaply" and often...