You already have the plane identified in your post, which BTW would have been easier to find if you had provided the link since it was over a month old. Triple Play by Chuck Cunningham. The CG will be easy to locate. There are a ton of messages stating how to find it on all shapes of wings. This one looks like it's a constant chord with a slight sweep. Because it's constant chord, you can take 27-30% of the chord at mid span and that's it. Throw on the elevator won't be tough either. There's nothing out of the ordinary on the configuration so stick with what looks about right and be prepared that it might be a little twitchy on the first flight. 3/4 - 1" throw each direction on a model of that size is not out of reason and would be a good place to start. Of course, if you want the absolute dead on information, why not try to contact Chuck through RCM?

John