flickoff - interesting.
I did my aeros training in a Robin 2160, which is what I'm continuing to practice in. We did regular spins, but the Robin isn't cleared for intentional inverted (not sure about flat, and as for things like knife edge spins... err, never heard of them!)
Anecdotal evidence suggests the 2160 is incredibly forgiving. It really wants to sort itself out, and you have to force it to misbehave. I've noticed this in spins (it won't hold a spin without positive rudder), it apparently still recovers if you use fore elevator (2160 recovery is aft), and someone else who got into an inverted spin and - without the opportunity to have learnt the recovery - let go and recovered.
2160 limitations and friendliness aside, I'd definitely like to learn more spin scenarios. The possibility of an inverted does worry me. The club is hoping to get a CAP10C and an Extra 200, so it looks like I might have the excuse/opportunity to do some training. Hmmm.