Hey, maker of the honey spinner here! Thanks for all the traffic and for spreading the design. I designed this specifically to be built and used by small backyard operations like myself. A few quick notes.
-The PVC plastic piping I used was from the hardware store. It ought to be ok for the honey spinner as it is the same stuff used for drinkable water supply in houses.
-How wide/deep are the frames in the top bar hive? You might be able to make it work, but even getting medium frames in the buckets was quite tricky.
Let me know if anyone has further questions.