DL, do you receive Timber Framing, Journal of the Timber Framers Guild? In the latest issue is a wonderful article on scribing, I believe it answers your question on plumb bobs and alignment. I have only read the article once and have lent the magazine out so I can not refer back to it, exactly. Maybe someone will comment on this system.

In the line drawings you are presenting I see bent layouts, do you also show the floor on the same plan?

Tim