Lego GBC Module - 31143 Bird House Reservoir

Original Video: n/a
Building Instructions: no eta
Lego48 BW 2018 Ball Pump mods: https://www.youtube.com/watch?v=qWdFtdq_s4o&ab_channel=LEGO48

3rd party GBC balls https://amzn.to/3q8QFvQ
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