I don't know what it about a Peacemaker but it is usually a joy to fly, ( no doubt like the Jnr Flite Streak )

With a good .15 / .19 on the right prop it can be a perfetly good combat plane as it can be set to fly pretty darn fast and can be turned quickly and "placed" accurately, the latter being a good thing when aiming for that streamer

Great for "friendly / polite" combat ( though these bouts often bring on the red mist, despite the promises by both parties to "fly carefully"

On the other hand, with a bigger, lower pitch prop and set a bit rich, it can perform the full pattern with no problems.

Not a very forgiving fuse though if you try a "powered landing" !!

I am on my latest one right now and I forget how many I have had over the years.

Build it light and have fun

EDIT = Oh, the O.P. question !! - check G of G - no more than 30 Deg elevator AND PRETTY IMPORTANT check the pushrod is not prone to deflecting on up elevator. Many folks put a lil support bracket half way between the wing and the tail, on the fuse, to prevent this happening.