Yes I can see how that makes sense, always tend to run with it on more than is required anyway just to be on the safe side. Question? Why when hovering at almost max weight so the mp is right up on the limit, the throttle pretty much approaching its limit does the carb temp gauge show its very cool, to the point of needing heat applied to keep it safe. I thought that the venturi would be well open and therefore the air not accelerating as quick etc etc...just wondered ? Loved your article on the icing, perhaps if I read it again I might be able to answer my own question but the pub calls for a pint