Thanks, Pike. I've been lurking on this site for a few months, and have come across reference to Keef's book - I ordered it yesterday through amazon!
I also have a Lyon & Healy Lakeside that is similar to this Washburn (same neck and headstock, but maple; similar bracing), but about an inch bigger across both bouts. Its mahogany. Both guitars are in pieces right now, but the work is coming along.
Thanks for your encouragement!