My team got the main parts of Bengle working last night, and this morning I got to make my first milk drink on it. This is the first publicly seen real-drink making made with our next-generation espresso machine.
Steaming took just 12 seconds, from 8ºC to 55ºC, and the foam quality was acceptable. I think we will can make steam even better, by fiddling about with the hole size on the steam wand tip and tinkering with the flow rate.