First of all, legally you are supposed to be Corgi registered. If you feel competent to go ahead - there is nothing else to add to your list. Take care to ensure that the differential pressure valve hoses (red & white) and the 2 speed fan (white, black & orange) wires are connected the correct way round. Watch out when pulling the fan motor connectors off as the whole terminal(s) is prone to coming out.
Ensure combustion chamber cover is properly fitted. Switch on and all should be OK.
xyzbird
October 2008