Of the many planes I have flown ... I love the way the WM Superchipmunk flies. It will do a nice knife edge with very little coupling. The plane is not what many people want to buy nowadays. Trust me its a lovely flying aerobatic plane (not as thrilling as a SU or Edge 540), something you can enjoy even as a Sunday flyer! Its got retracts and flaps too!!!

Mine was powered with an ST G90 and it was just nice for me, can hold a knife edge easily. I think with your G75 it will be great turning a 12x8 prop, a 13x6 perhaps if you wanna fly with more torque.