Yes, I think that was the problem. Appears to work now correctly seated.
Just need to work out how to work the rest of it. Your...
Managed to fix it. At least to the point of getting the steam to go off. Machine needed to really cool down completely - less...
Yes - the knob should really only go on one way to fit the profile of the D shaft and grip the flat bit.
Have contacted the retailer...
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