How to reduce ChiliCube noise level by replacing fans

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Cable tie down the 3-way switches

Again, if you are going to keep the water retaining safety feature, do not drill these holes.
It might be possible to use silicon caulk to seal these penetrations, and around the switches. It is just very hard to verify the security of those seals.
Drill two small holes on each end of the where the switch will go, and then loop a cable tie through to hold the switch in position.

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