Tim, you say, "lofting" and then "plumb line scribing" and I wonder exactly what you mean. Plumb line scribing is more clear to me but lofting is interesting because it's Norwegian and I've seen you use those unified knee braces just like the Norwegians. Is that how you use the word, that you'er using a Norwegian method?
I might as well get back to this one. This axe is intended for squaring up rafters, but will do for any smaller dimensions.
These are 120 x 120 mm rafters. Six plus meters in length. Flat but not straight.