Hello, Chip. Very well done. Do you have a particular version or you have modified the original screen for Mach3? In my version, the 3,042,020 pins are not numbered and inputs 10,11,12,13 and 15 are arranged differently. You could tell me what the Code of OEM led each pin from n. 1 to n. 25 or, better yet, send me a copy of your screen? Regards. Giordano