Yep, I made a thread on it a while back too
http://www.luthiersforum.com/forum/viewtopic.php?f=10101&t=27920Came to the conclusion that I'd probably try it sometime, although I've been a little wary still, since getting the neck angle right on the first shot would be rather tricky. Even moreso given my freestanding workboard-less construction style, using precisely bent sides, tentellones to glue those to the top, and spool clamps to glue the back. At least my first one with bolt-on only took 3 passes of shaving the heel to get the angle right, but there's also the issue of getting the body shaped to match. The fingerboard extension doesn't lay flat, maybe 3/64" space under it at the soundhole edge. Fine to just spring down on this one, but for integral neck I would rather be able to flatten the whole neck to soundhole surface before gluing the FB with a long flat caul.
I'll probably do bolt-on again next time, but arch the upper transverse brace about 1/32" more and see if I can get a perfectly flat surface. Then do integral neck on the guitar after that. I could make a full workboard, but it's an awful lot of wood and work and storage space, and might still not come out quite right on the first shot or work for all my shapes without making several of them.
Long term box distortion is of course the biggest issue though. I'll definitely use the equivalent of a C shaped headblock to minimize distortion of the upper bout area (headblock extension under the fingerboard that butts to the upper transverse brace, and Spanish foot to spread the pull over a larger portion of the back). Probably an X brace in the lower bout of the back, maybe full asterisk, and ladder braces at the waist and upper bout.
Definitely would be more comfortable if I also included the headblock-to-tailblock rods that some builders use, but I'd really rather not. I'd probably go with the style of Haans, who puts two of them that go off to the sides of the soundhole so they're not being visibly ugly in there, as well as forming a nice sturdy triangle. But it would still be ugly looking from an angle, and make brace shaving through the soundhole more difficult, and add more weight at the tail for their anchor blocks, and more work of course. I think I'd just stick with bolt-on before bothering with those.