DIY tank overflows

[dbman]

This is kinda weird I know, but I'm trying to build a Plywood/glass aquarium GARF-style and I'd like to make either dual corner overflows or a big center rear overflow, either way they will be bottom-drilled with a durso standpipe. My question is how can I attach the boxes to the tank? Should I make a full (4-side+bottom) acrylic enclosure and then silicone that against a tank wall (tank walls will be multi-coated two-part expoxy) and run the bulkhead through the bottom wood and a layer of acrylic? Or can I just silicone or epoxy the edges of the acrylic against the wood tank wall? Anyone have any thoughts on material compatibility here?