Looks like heater insulation degradation after it's being overheated. On switched off machine you could try to test resistance (mOhms/kOhms) from phase or neutral to machine ground. Should be infinite. In some cases on cold machine it could be ok, but once heated, heater's internal insulation starting to be conductive, resistance drops and current goes to the ground

It seems to be in very nice condition. There are many people who would absolutely love to restore and use a machine like this. But maybe not a good candidate for a first restoration unless you were very confident in your abilities

Another option is creating a "guest" network. Most routers support this out of the box with a different password. On a related note, here's a video published on my day job for IBM: {video}

The app connects to your machine via Bluetooth for basic functionality, and via Wi-Fi for other features. Thus, for setup and thus full functionality, the app must connect to your machine via your local network. Whether you want the machine itself on your local network (and Internet) is a separate issue, and arguably a greater potential privacy/security issue. As

Using an old Foodsaver vac machine I've modified for manual control and their wide mouth canning jar attachment

are you vacuuming the air out of the jars with a special cap or are you placing the entire jar inside a vacuum seal bag?

Thanks Yes I will try that next. It has an old Italian power plug (3 poles in a row), so I will have to recrimp that first. Unfortunately my electrical skills are on par with a plastic bag. But I will give it a shot xD

That was my interpretation on it as well. However, Barista Hustle's tool implemented faster spin by design and it kicks up the grinds in the process which does create some level of randomizing. Only downside (in my view) of their tool is the price. I suspect that Etsy may come up with their version of such tool

Welcome Bernd! Beautiful lever machine! I'm looking forward to hearing more about what you decide to do. Why not just connect it to water, turn it on, and see what it does? At least then you'd have an idea of how functional it currently is. Great idea to talk with your local Pavoni repair shops about

Ah, makes sense. I changed it. I was converting it to an int not a float. You can now register and have all your profiles stored across devices. I have not fully tested it but should work well enough. You can also use the site without registering with the previous limitations. I think it is nice