Have cycling rediscovered and am thrilled just to the air pump I was almost desperate. This air pump is the solution and I would have a lot of money can save a lot of scrap.
Once / week for four light strokes ..4-5 bar and you're done.
The pressure gauge is easy to read and to compare with my 40 (!) Years old Reference (then there was precision made in Germany for less money) and sufficiently accurate, constant deviation -0.2 bar.
When connected to the valve I have to practice. I think I know that one could construct something better, smoother and less. On the other hand it looks indestructible from robust.