: No software - I just enlarged the line drawing 16X with the poster
: option on my printer, taped the pages together, and used my
: calipers to measure for the offsets. My enlagement was 4.79
: inches smaller than the actual boat, so each measurement was
: multiplied by 4.79" to get the numbers I needed.

My enlargement seams to be 4.77 smaller than the actual boat. It's near the same, isn't it?
Would you be so kind to share more picture and/or info about your boat?
What about the cross sections positions? I guess you used the existing 2', 4', 6', and 13'... plus 9' 1" (backrest) and 10' 12".