I started first in 2020, when the inspirational project still was fresh. I ordered only the base components for the self-oscillating fork circuit (that you can find in the inspiration project) along with a self-supporting holder.
I did not directly design a PCB, because that was the first hurdle and I did not want to waste such a big PCB in testing phase.

However, I was not very successful on the breadboard and the Fork did not hold itself reliably, so the project got on hold.

Only much later I re-started the project and "just went for it" on a stripboard and, behold, it worked!
So it turns out (if you want to replicate that!), that my breadboard connections were loose enough that the vibrations from the Clock somehow made it very fragile.

Well, now it is stable, and I can start with my original project question: Can I make it more precise?