A Carriage stop. I wanted to eliminate the possibility of "crashing" into the rotating chuck. I made it out of some A-2 Tool Steel (just 'cause I had some laying around). A 1/4 - 20 adjustable screw, with knurled head and knurled locknut provide some latitude in the stop position. It clamps to the underside of the way using a socket head capscrew and knurled locking screw. The head of the lock screw is large enough that it can be secured without using a wrench.
I got tired of finding the correct wrench for the carriage lock. A home-made square hole wrench was made, and it will stay on the locknut, out of the way, but always there when needed.
