Hello @slickrock , happy to see you here.
After Susan starting this topic, my clear hope and target is to have a comforable Huky by end of the year. Either a semi-automatic or a nice follow the curve version
You mentioned the cost -yes- but for me the blocking points were
- finding a valve for use in Europe ( spent weeks last year to get a Maxitrol Exa and failed)
- beeing a bit shy about gas installation
- lack of understanding of the necessary programming
So a stepper motor moving a knob is by far not elegant, but it is achievable and you work on low voltage and don't have to touch the gas system.
Both is reassuring if you are tinkering and need a trial and error phase.
I am very keen on your second post showing a siplified version,
assuming it will be based also on the Clippard EVP, as I (and several friends) failed to find any alternative.
peter