Fonsini (#1),
Never got one myself, but in 1945 got one for a Captain van den Poel (SAAF), loaned to me with his Thunderbolt II, in which, on take-off, he clipped a ****ehawk with a wheel, ripping off a patch of rubber outer casing and exposing the inner tube.
He landed on this with infinite care, the tube did not blow out. I sent his log book up to my (225) Group: they put in the Green Endorsement. Forgotten the wording now - it's been a long time.
Never heard of one since.
Danny.