Hi Tom
Have you got any photos of your beast ??
I had a half share in the YS53 back in the mid 90's !
I thought she was very pleasant to fly ,the added fin/rudder area probably helped.The wings were ridiculously over engineered LOL,from memory there was a rib every 9 inches...ooh my aching back !!
My syndicate partner always said we should remove half the wing ribs - I did not disagree but thought that the BGA might complain LOL.
She had been flipped over in the gales of 1987 so had been modified with a K13 ish canopy
sorry about the poor quality pics,I dont have any better ones.
