I need to "shorten" the boxes; removing 3-4" from their height.
I had originally planned to use a circular saw and a clamped-on fence. I may still do that, although it would require six setups (for the two sides and back of each unit).
However, a table saw has recently entered my orbit. I had originally thought to set the saw's fence 3" from the blade, thus having the "waste" piece between the blade and the fence. Further thought tells me that this could be dangerous, especially on the third cut.
But the cabinets are too big for a standard miter gauge, and in fact too big for the table. (I believe there is an auxiliary table I could use that is the same height as the table saw, so that might not be a problem.) But I suppose I'd need to build a sled with a stop. If I end up using the saw a lot, a crosscut sled might be a useful thing, but my time seems more and more limited.
I'm sorry for thinking out loud, without asking a clear-cut question. But that hasn't gotten in the way of useful advice before, so have at it. :)
Thanks in advance.