Do you have a setup you can experiment with? A CAD program loaded and maybe a scanned plan of the Bird of Time?
I have Auto CAD Lite. I'm going to search a wing to scan or a fuse and paste it in ACAD and play with splines.
For splines I went to a AutoCad Yahoo groups discussion group for hints and... no, no hints in splines were provided. An ACAD guru said practice and practice. The ACAD manual isn't very clear in this subject, so I think I have to waste some time taming splines.
Thank you for all your help.