Bill, what is the vertical spacing between the rungs - 18" or so?
Yes, 17-1/2". I figured out where I wanted the top one to be and where I wanted the bottom one to be. It thought the spacing should be about 18", but it worked out to be a little smaller. I measured the distance between the wires at the top step and at the bottom step then set up an Excel spreadsheet to proportion the ones in between so that they would not bow the shrouds apart or together.
1988 PSC 34