Matt
We as a group are enamored of lever machines. They celebrate getting back to basics and making the user totally immersed in the process. The Cremina exemplifies this form follows function simplicity. Indeed, it is the pinnacle of manual lever machines. The machine is designed for extreme quality and simplicity and to last a lifetime. Part and parcel to this is to avoid all unnecessary complication. Every part is needed and nothing extra. It's beauty lies in the simple elegance and superb results that it is capable in the hands of a skilled owner. We enjoy using our hands to craft that special pull even using the feedback of the lever feel to involve us with the process. Adding complications is contrary to the entire concept. Of course your addition is a minor one, but it taints the water. Why not go further, how about a temperature sensor that shuts the machine down when the group gets too hot? While we are at it, why have that annoying hand lever when an electric pump can do the job so much easier without our having to pay attention. We can even design a computer control system for that pump that can be programmed with every aspect of the pressure profile over time. Are these things bad? No, but they are not what a manual lever is about. Soon after you turn the machine on, it is necessary to bleed false pressure from it (unless fitted with the vacuum breaker cap). In but a few minutes after that required involvement the machine will be at pressure. The user involvement is what these machines are about.
In the end, it is your machine to do with what you want. It is a very minor matter to wire in such a buzzer-so enjoy.
