You may also like the Espresso Forge, which manages to go even more reductive than what you propose, forgoing the pumping, or any sort of leverage, in favour of a piston for you to push on with a basket on the end.
You may also like the Espresso Forge, which manages to go even more reductive than what you propose, forgoing the pumping, or any sort of leverage, in favour of a piston for you to push on with a basket on the end.