@DavecUK
I was wondering if you know of changes made to this roaster over time? The trier and handle to raise the door is different on my roaster than the one you have and the one that was pictured on BB’s website. Also, the PID for the bean mass seems to turn the heater off before the ET gets even close to 220c never mind 240c. The BT probe seems to be quite accurate and reliable, consistently FC starts at 195c and matches closely with the thermocouple I have actually sitting in the bean mass.
Did a good roast today and have always meant to ask the question.