How does the minimax respond  in a stall? How does it respond in a brief spin. ?

Don't spin it. It will recover benignly using standard spin recovery. That doesn't mean try it. Stalling, if done right in a properly rigged aircraft under lab conditions is no problem. It mushes, nose down and add power. If it is not well handled, rigged or it is gusty, a wing will drop. Be ready to use your feet.

My experience was in an Airbike....same wing as the Minimax.  Stalls are benign...nose drops and you are flying again.  I did two turn spins and the plane recovered normally.