the op asked about not using screws, cabinetman
also, isn't there a potential problem with using glue?
i understand gluing long grain together, but isn't there a problem if it's glued on the long grain on opposite ends?
ie:let's say the table top is a wide rectangle with the long grain going left to right.
if the front is glued with a few glue blocks, and the back is glued with some wood blocks, could the expansion in the summer make it break loose?
most homes don't experience this kind of humidity now a days though.
i actually have no idea, but it seems like it could break loose if put in extreme environments.
is there any difference in expansion between the rings' radius and circumference?
these are both cross grain references and not tree height.