That's kinda known already in the GA world but a coincidence in the early series 4 seaters, C175, dog, C177, dog. If they where sucsesful they would be making them today!? A friend if mine has an RG strutless gutless he bought it so his wife can get better access, they are known for room but it sits in the hangar most if it's life, he is less than impressed with its slug perf. I did my retract endo in one a hundred years ago, loved the view and space but that's all!?