I have a deep that I use for school presentations, but would never consider using it for real. Too many issues to deal with.
http://robo.bushkillfarms.com/frames-and-frame-assembly/You'd be better off to put a window in a wooden box like they do with some TBH. Be forewarned though, it won't help much because the cluster will be buried in the middle frames out of sight. There is a reason observation hives are only one frame wide
