You can switch just about every part on my list for something of your own design. If you can make it work, then it's worth a try.
Here is a sketch of the new bucket series I am making:
It should have been done by now. I thought I would be smart and go with real aquarium bulkhead fittings insted of the O-ring set up from this thread. They cost $6 each and every single one leaked. I have all the holes drilled in the buckets, so it's kinda late to back out of the bulkhead fittings. I'm going to have to use a sealer. Not real happy. A picture of the fitting below:
Will show real pictures as soon as they all dry
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R.