If anyone is interested, I have posted more information on, including photos of, my 3" system elsewhere on the PI BB:
http://pantera.infopop.cc/eve/forums/a/tpc/f/1550045562/m/4450006983
http://pantera.infopop.cc/eve/forums/a/tpc/f/1550045562/m/8450002583/p/6
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