One hint, be VERY VERY careful not to knock the boiler drainer pipe.
It's very easy to do and will break where it's been soldered on and its major pain to resolder.
Thanks Jim, I actually knocked that very pipe when draining the boiler of excess water this morning. I placed a "too large" dish between the pipe and the boiler and felt some resistance. Thankfully there is no sign of any harm but I will be very very careful in future to watch out when near that area.
Bruce
NZ