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Use this “unit cell” model to make your own maddening matrix of pointless pipes.
See here for video of example: https://youtu.be/_qbFnAOSWBo . Download example model here: https://than.gs/m/879855
In this “Plumbers’ Nightmare” example, each pipe follows a random path through the matrix. Don’t hook the toilet up to the sink.
See here for similar design: https://than.gs/m/847890