Dora
You certainly know what you are talking about
I had the great privilege of learning some basic aerobatic skills in this wonderful aeroplane. The only disconcerting thing with the Chipmunk was the engine cut-off if you stayed inverted for more than a few seconds.
My dad used to call it the poor man's Wirraway. He trained many people on both.
I agree with you wholeheartedly that the Chipmunk will not recover from a developed spin without very positive and coordinated input. Full forward elevator is a must, especially if the CofG is at aft limits.
Great to see some really useful stuff being posted.