I built one but my plans" evolved" as i went along so i have to go back and figure out which measurements i actually used. Which part specifically do you need? I know for me the hard parts were deciding the diameter of the hole relative to how deep in the table i was going to put the egg, then figuring for table top thickness and thickness of the stone it rests on.
"I can get a good look at a T-bone by sticking my head up a bull's a$$, but I'd rather take a butcher's word for it". - Tommy Callahan III
XL Big Green Egg, 22.5 Weber OTS, WSJ Gold/Mini WSM, 18" & 22" WSM, UDS "No.8"
Flyers Orange Thermapen
Napkin Killers BBQ