Wayne Parham Messages: 18789 Registered: January 2001
Illuminati (33rd Degree)
Mount it externally. That makes driver mounting a snap. You can route it flush if you'd like. As for bracing, the top and sides are solid but the front and back panels need bracing. Brace them well, at least put a cross brace in every 18". If the panel doesn't sound like a solid block of wood when you tap it, then you need additional bracing.