Hi Masters! - didn't get it sorted out yet, but didn't have the issue with the yoghurt I was making... I suspect it is either the soldering on the connection from the temp probe or to the socket for the temp probe (mic jack for removal). Or... I have a feeling that the element might be pulling more than it is supposed to. I think the heatsink is getting a lot hotter than when I run the first system - but I'm not sure what impact that would have on the other components / and if / why it would cause issues?