be strong enough to hold it? It's going onto a plasterboard wall and behind it a 1 inch gap with some kind hard wall. What kind of screws and plugs would you suggest to use if i screw it into the brass picture hook to make it steady? be strong enough to hold it? It's going onto a plasterboard wall and behind it a 1 inch gap with some kind hard wall. What kind of screws and plugs would you suggest to use if i screw it into the brass picture hook to make it steady?