ORIGINAL: Mustang Fever
...I used Troy-RCUs method of adding root chord and tip chord and dividing by two. It's important to remember though that the true root chord is an extension of the leading and trailing edges to the centerline of the fuse, which makes it quite a bit longer than it is where the wing meets the fuse.
Using Troy-RCU's method I checked the CG on one of my deltas. For it to come out correct I did have to use the center line of the fuse.