Tim,
Thanks for the info on hand cutting -- always interesting to compare methods. It seems to me that's moving right along with hand tools. If I may ask -- when you mention that you can do one in 15-20 minutes, is that an average time or is that a record time?
As for our time -- we try to average 15 minutes per square rule (rough sawn) brace, layout and cutting. That's a simple, barefaced 3x5 or 4x6 brace. All cutting done with circular saws. We size the back with a hand held power plane when needed.
cheers