abinet man for forty two yrs . put your plywood down first , then glue on plywood, then glue on formica.after all has ben fitted use pieases of pvc pipe to line it all up.spred pvc pipe apart to keep from sticking together ,line it all up ,pull pipe out one at at a time ,sticking as you go. the knoseing or lip of top needs to be on first .put formica on lip route flush then sand the top .filling all holes with bondo works good,flush bit with vasline to keep from burning formica. a small file will get sharp edge zcars4