The Cessna Skycatcher was unrecoverable from spins before the aero department resized it. I might dig up a picture of the earlier (crashed) airplane with the small tail and post it. Two of the S/C protos crashed, although if memory serves only the first because of the tail. I know the test pilots, they came out fine although I am sure it was a hell of a day for each of them. Beyond that I can't think of anything else right offhand. Like I said, it is easy to design a big enough tail and what is surprising is when it is not big enough. It usually turns up during spin testing.