Laundry Detergent Assistant! (Old Dutch)

EDIT!!: New version of the model has been uploaded, featuring a slider and ball to push the valve open. This is much more convenient than the previous model, I've printed and tested it. I LOVE IT!

I'm not THAT LAZY! (honest!)

Anyone can push a button, but this near "Rube Goldberg" device has been inspired by several gadgets I've seen on here, but I designed this from scratch for my use-case.

I created this because, after I injured my shoulder, it is not comfortable for me to raise my arm and push the firm button at arms-length, so I made this do-hicky with a strong support system around the handle and a long lever to make it easier to use my right (favoured) arm.

This "system" has been a long time coming, took a LOT of fiddling, but works PERFECTLY with each other part in the system, and is designed for OLD DUTCH bottles with the button-spigot. The volume is 6,000ml (6L) (approx 1.5 gallon). Pics in the description for further details.

I was inspired by (https://www.th