I have a 12" CMS (non-sliding). I originally got it to build a deck, and needed the extra capacity that the 12" offers. I personally would be PO'd by the limitations of anything smaller, but that's been my experience and, of course, YMMV. Perhaps the sliders aren't as precise, but I use my CMS for nearly ALL crosscuts (that it can accommodate of course) and it's accuracy is completely acceptable for everything I've used it for so far, but I have not tried for ultra-precision yet. I do have a Wixey digital protractor and recently used it to precisely fine-tune the saw. It's now dialed in pretty nuts-on, so not sure why I would need to use any other method for the sizes it can handle.
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