I've been using 4 dominos and six kreg pocket screws. I prefinish the plywood so only the dominoes get glue. Too many? Too few? It's 3/4 maple ply sitting on a ladder base. I tend to stray towards over building and have little love for sheet goods and no experience with this. Seems to be fine, but I don't have the 5, 10, or 20 years to see how it holds up.