+1 What Solar said. If you use standard plumbing fittings and just dry fit them you can run it see how you like it then modify to your hearts content till you find the configuration you like.I recommend building one first and then after a few smokes on it you can always change the design or even build a new one. Most of the parts can be stripped off and reused and drums themselves are fairly cheap once you find a source for them.
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