Dell Blanking plate issue
We have a number of Dell SFF optiplex machines with blanking plates covering the 3.5in opening. We have found that a number have been pushed in or removed allowing students to remove or tamper with RAM. We have tried replacing these plastic covers with the same covers with the same effect as they have little tabs to hold them in place (easily snapped off!),these also work out at £10 each. Does anyone know or have a solution to this problem? We have tried a metal cover covering the hole but this just gets bent allowing access again as there is nowhere inside the machine to secure it on all edges.