I haven't run a Fox .15X in a long time, and the last plane I had one in was a SIG Acromaster. I really didn't know what I was doing back then and was probably running it on the wrong fuel and too much prop pit, but I remember it putting out enough power to really haul the Acromaster and get my attention! I have no real concept of the size of the profile Peacemaker, but if it's in the realm of the Acro in size, it would be adequate for the job if the correct prop for it were used. I'm going to have to duplicate that airplane/engine combo just to revisit it and see how it performs when properly executed. I'm thinking that any short comings of the Fox that others have had can be over come, and if not, try something else!
Good luck and have fun,
Dan McEntee