So far the new water pump has been working great. I decided to add a water level cutoff switch.

I used a two step switch so I would get a warning before the laser gets disabled.

I wanted to mount it to the lid so I 3D printed a stalk to hold it at the right height

With the extra wires I was going to need a bigger junction box but instead I just 3D printed a bubble top form the existing box.

First I thought about an aviation style connector…

Then Im settled on an RJ45 so I could use a common network jumper cable

I used half a coupler.

Just crimped on some pins to get it connected.

It fit pretty well since the coupler has a slight taper. A little glue will make it permanent

And a matching end for the controller.

Plus a few extra parts……

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