Youngblood...each half foot is incremented 7 inches on each end maybe? In other words, for every 6" increase in span you make a mark 7" further down the suspension line?
That I understand because it is just what I was saying earlier...and I think you mentioned it to me in a PM once...
If you really and truly mean what you wrote as you wrote it, I don't get it.
Grizz... you have two suspension lines so you increase it on both suspension lines. 7" on one plus 7" on the other equals 14" of total suspension line for every 12" increase in the span. There is a doubling effect in there with marking and centering, I have synchronized the length adjustments of the two suspension lines.