Greg phone around to some glass shops they will be able to drill the tank for you.
As far as a refugium for a 7, I would say if you are going to do it, just use a rubbermaid container with a Power compact 17 watt, its an easy and inexpensive way to go.
FWIW I love those 7 gallon bow fronts, check out the pictures section there is an excellent picture of one AND the guy tells you how to save $$$$$$$ on lighting..
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