1/4 scale Champ Bud Nosen used a Quadra 42 the weight balanced it out perfectly and I flew it scale at 1/3 to 1/2 throttle. Its very nice to have a little extra motor when you need it to get you out of trouble. If your flying at the smaller engines limit and you need that extra power to pull you out of trouble you may be out of luck. Throttle management is everything. You will have to end up adding lots of weight with the smaller motor why not make it usable weight by installing a bigger motor.

Dennis