Darryn:
Can I ask what kind of glue and surface processing you use to make that combination stick together? It would also be good to know how you deal with electrolysis if you use carbon.
I know that you need special glue films and autoclaving, or great amounts of epoxy-filler to make alu-honeycomb stick to glass.

I got a tip some time ago, to sand the alu with 80grit sandpaper and apply the epoxy immediately before oxydation starts. Is this what you are doing?