piper,
one of the guy's I fly with had one of these and just happened to have a 25 fsr on it, it flew well power wise however it was well beyond his skill level... these little buggers are fairly quick and twitchy. anyway it looked like it could have been a nice little plane/engine combo until he slowed it down to much on landing and snapped it right in. I've piped several .25's in the past... on this little guy I'd skip it, the plane will be more than agile and fast enough with the stock .25

John