Hmmmm, I didn't read every post but the ones I read seem to be missing the OP's point. I think Dave stated it well, a Tipo type or Curare type that flew everything, not just landings, at Kadet speeds.

Take a look at the Kadet specs: around 900 squares of wing hauling around a 4 1/2 to 5 lb weight with a 40. Nothing like that available today that remotely resembles a Tipo or Curare. That doesn't mean that a new model couldn't be created to fit the bill. The guy wants decent precise flight (which these pattern models would provide) but at around 1/2 - 2/3 the speed.

Forget fattening wing sections, squaring off the wing planforms like the U cantdo, and so forth.

Add the power and weight requirements to a model design resembling the Tipo or Curare except get a bigger wing on them and you would have something worthwhile to fit the original suggested requirements