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Admittedly this is very crude but it stops the carriage where I need it to. I show it only to suggest that you can get work done without going overboard/over budget/over complicated. The adjustment bolt is 1/4 20 so each full turn is .05" so the adjustment is (again) crude but functional. I needed one in a hurry and built this in less than a 1/2 hour. It has been sufficient for my home shop purposes for several years now. It is just a scrap cut to a "C" shape on the power saw with 2 holes drilled and tapped, a toilet bolt, thumb screw and nut from my junk/bolt drawer. If Necessity is the mother of invention, a good junk drawer/scrap pile is the father! Cost $0.00, stopping the carriage from hitting the chuck, priceless ; )
Did I mention it is crude?

Ken H in AZ