6'1"/size 12-13/too big to say
I demo'd a KP6.3 last fall, and I thought the foot room was great. I had the seat either in the middle or slightly back position, and there was plenty of room in the front for foam outfitting (the demo had none). Also, lots of foot "volume" so my feet were not pinched or contorted any.
I have a Super EZ now with the foot tray removed, and a foam bulk head. I am convinced that the wave sport foot tray is designed for people with size 8 feet or smaller. Wave sport could easily fit a larger tray in my SEZ, and I think they should make a larger one for that boat (any of you reps listening?).