Many thanks to everyone who gave constructive advice about carriage stops when I asked for it. Special thanks to Bogstandard for his insights, and to Itowbig for putting up a picture of a carriage stop that he made, which also holds a dial indicator and can be used as a measuring device for carriage travel as well. I made this up this afternoon, based on the picture that Itowbig posted, and it performs very well. When I am moving the carriage manually, using the handwheel on the end of the lead screw, it definately does stop the carriage. If I accidently run the carriage into it under power, I don't really know what would happen, and I sure hope that I never find out. (and yes, it does clear the leadscrew by about 3/16"----the camera angle is a bit funky) Once again, thanks for the help.---Brian