this is what I am struggling with...the 1 5/8 is small, the NARROW 1 11/16 has a spread like a 1 5/8, and the WIDE 1 11/16 is a true 1 11/16? So what is the difference betweem 1 5/8 and the narrow 1 11/16?? What does thst mean??
I guess I need to play a few examples and then look up the specs.