I knew I couldn't attach the ends to the legs cause if they expanded it would have all broken apart. So I rebated some mending plates into th top of the legs, got them from focus they are just a bit of steel about 5/6 inches long with 2 screw holes in either end. Screwed one end into the top of the leg and then screwed upwards into the top on the main part of the top not the breadboard ends. So far it seems to be working perfectly.