Great write up, really enjoyed it.
Bonnet catches, I found (find) them difficult as well. There is a nack push down and pull out. Try one at a time.
Peter, thanks for your tip on the heater control, mines has been only showing 2 clicks. Just tried with more effort and was able to turn it anticlockwise so now have 5 clicks. The graphic is horizontal in 1st position (off?)
2011 Plus 4