I'm surprised that no one has chimed in. I have not been able to test my Rocket to aft CG because I can't get there. If I recall correctly, with 100 lbs baggage and a 200 lb. rear pax I'm still a tad from full aft. Pitch and roll harmony is ideal with a 160 lb pax and abut 60 lbs baggage.
Taking a stab at your question: I bet it flies just like a -4 at full aft CG. Somewhat touchy in pitch and perhaps a handful. I've flown my -4 at full aft and I don't find it disconcerting. There are others that would certainly disagree.