Indeed, ifitaintboeing! I recall doing an SEP renewal (free of charge - PtoF aeroplane....) in a very nice RV-4. The CG was probably quite aft with 2 PoB and while the aeroplane had nicely responsive controls, trying to fly it accurately for any length of time wasn't all that easy due to rather limited pitch stability. So for flying in IMC it would be rather tiring, I would imagine.
I'm told the early Spitfires were rather like that too.
Good to have seen you last night!