Stilgore,
Peter's flat pack is as close to perfect as you could wish for. I am in the final build stage, just put the sealing primer (B-I-N) on. Can't wait to hear them.
The parts are cut perfectly, and the braces fit exactly. I even got a used router w/table to put the radii on the edges.
The entire build process has been fun. Although I am sure my final product won't look anywhere as good as some, (especially Peter's), they will sound just as good thanks to Danny's design. The joy and accomplishment is in the doing.