Update:
Mounted the entire plant to a piece of walnut I ordered, then stained. It has a nice tree bark edge finish which really looks great in my eyes.
I also added a brass water cup for the hand pump, and used a boiler bushing to connect the pump to it.
Lastly, worked on the sight glass more. It had leaks at the glass. This was quite an endeavor and spent 3.5 hours on it this morning. Finally leak free through trial and error.
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