Here is what I'm working on...
I have a OLED panel now installed and you can see a very crumby video here of how it is working and what I've been playing with.
I installed grey tanks and added sensors to it but need to run the wires to the control panel when I redo the front section of the belly pan.
I just need to add the warning LED to the pressure gauge which will turn on when tanks are FULL or EMPTY depending on which tank, etc. Then I need to finish the permanent wiring and mounting it back in the panel. I will rebuild the entire panel insert as mine is a bit worn but I wanted to keep the same vintage look while modernizing it a bit!