Yes, there are several, just too expensive to just go and buy one. I found them to be from 600 Euro up in the basic version, and we'd need a more advanced version. Post small scans of the pictures and I'll ask if I can borrow such a program or use it elsewhere. (See my yesterday reply.) Or maybe you know a surveyor, a construction engineer, or architect who does photogrammetry and lets you run your pictures through his program.

Undoubtedly, I've been watching too many "conspiracy type" movies. But that assumption was just - nuts. I stirred something up what even led to the (probably) right/true assumption I've described in the next post. Remember the calendar date!

The photos of your copy of the Myers plan show really nasty blotches what means this is a copy of a somewhat soiled and wrinkled paper plan. In fact, it's a blueprint, and supposedly the other paper plan was a blueprint as well, which is a contact copy of a transparent master plan. Your plan is at least a grandchild: master-copy-copy.

The blue color comes from the copying process. It is even possible that a plan is stretched compared to the master if there's not enough friction to hold the copy firmly on the master. (The copy machine runs them through rolls.) That's why there are dimensions in nearly all plans so you don't have to rely on a true copy process. But you can rely on Frank Myers as well as Ed for following the NRN rule and drawing exactly 3" rib spacing (OK, as exactly as drawing can be). [8D]

Use this as a scale, check the other dimensions and they should be nice round numbers as well, and check for straight lines and right angles. This way you can figure that plan/copy out.