Flew the mini Spit today. I finally got the roll rates low enough, 15% with 20% expo, and it was a joy to fly!
I managed to do several short slow flights, without the top cover on, but after several hard landings the nose started to wobble back and forth a little. And on the next landing, the battery catapulted itself through the front of the nose.
I'll assess the damage later.
My problem on the earlier flights was definitely tip stall at lower speeds, combined with overcontrolling the ailerons, but once it gets going faster, it settles in really nicely and is super stable.