I have just posted a photo of the Canterbury Aero Club Beagle 121 Pup I flew when instructing there in 1976-1977. It was part of the fleet as an aerobatic aeroplane. The controls were light and well harmonised but the g factors were not as high as some pilots would have liked. It had been out of the air for a period, cracks to the main spar (I think). It was an under appreciated aircraft that might have sold well with the marketing skills and organisation of Piper or Cessna behind it. You could say the same of the Bolkow 208 Junior. A much better a aircraft than the Cessna 150.