I'm not sure what the builder of my plinth used for glue (I think it was a two part aircraft epoxy) but we went with bamboo ply instead of the birch. I have heard the same plinth design in birch and bamboo and the bamboo has somewhat more impact in percussion and a slightly better focus then the birch other then that its about the same. the bamboo makes for a beautiful looking plinth as well. I would say the bamboo is some what more sensitive to what footers you use then the birch. I found the birch likes cones the bamboo likes a little more isolation I use ISO Acoustics Orea feet as the bamboo is somewhat heavier then birch (my plinth-table is close to 100lbs).
I have pictures of my plinth in my system pictures if your interested.
I have pictures of my plinth in my system pictures if your interested.