The CT does suffer from a known fuel situation, in that, should the a/c be flown out of balance, or indeed be parked on sloping ground, the fuel gravitates to the lower tank, when flying in this condition, the a/c does tend to drop the heavier wing, that condition will remain I guess unless the wing is raised higher to compensate and equalise the fuel. It may well be that Mr H had fuel in the lower wing which failed to reach the carb. I would imagine that this would only occur when very low on fuel.
I doubt very much that there would be any mixture control on this aircraft.
It is a very nice aircraft to fly, relatively fast and very slippery, with as previously mentioned a very low stall speed, with when required a very short landing. Probably much less than 100metres in skilled hands.