Sorry I’ve been crazy busy at work and also agreed to bake an elaborate cake for a charity bake sale that took 2 full evenings after work so I haven’t had time to come back to this. In order:
There are more pictures attached, I might have been in portrait mode and hence the blur.
Overflow was likely a bad choice of words on my part, it’s the return line I assume. I have drawn an arrow pointing to it on one of the pictures.
Brew temp normal, decides if it wants to do 93 or 94 daily but it picks one and stays there - it’s set for 93
Shots are normal
Buttons are a pain in the ass but they always were - you push it to stop the shot and hear the click but it keeps going and you have to push it again occasionally but this is not new and both 1 and 2 do it so I assume it’s characteristic
It was a fainter noise at first, I convinced myself it had always done it.
The return tube is bubbling, the tank gets so hot I wouldn’t like to touch it bare handed, the return line is discoloured to an opaque white and in operation so hot I wouldn’t want to touch it and the tank enclosure has some condense on the walls. It’s worse when the water level is lower but the machine also only runs from about 730am to 10am daily and is switched off then until the following morning.
The brew pressure has been normal, I believe it runs at around 10 but it’s been a while since I paid much attention to the gauge.
There is definitely a leak from the brew boiler as I guess we could already guess. The first time I powered it up I was working on the cake across the kitchen. I heard the evaporating water and came back over but by the time I got a look, there was just residual water on the top of the boiler and the source wasn’t clear. I believe there is evidence of a leak on the tube that goes into the back of it with a silver fitting though, arrow pointing at the suspect in the marked up picture. I suspect the leak doesn’t happen every time as I’ve turned it on a few times since and watched like a hawk but I’m yet to replicate that behaviour. I’ve retrieved my Kitchenaid from the garage and am not using the machine daily until the issues are resolved. This is sad as the steam power on the kitchenaid is pants.
If it has two issues and the water only leaks on the brew boiler on warming up, I would never have noticed that as the husband turns it on as he gets up first and it’s been on for 30 mins by the time I’m in the room with it. He is scared of it in general and won’t use it, just turn it on! I have a video, I will try to figure out where to host it and share in a follow up comment. 
