For the Avistar I use a VERY VERY high tech TOP SECRET balancing method called.........

My fingertips!!!!!

Seriously, I measure the proper balance point on the wing and use some tape to mark the range. Then pick it up with your fingertips and you should be able to feel if your on the tape or not. Sicne its a trainer, the Avistar is not as sensitive as some other planes, and having the CG forward or back 1/4 inch will never even show up unless you are working with a very rearward CG (not recommended for first flights) and then small changes make large differences.

For best results, its best to epoxy the wing halves together. However, I don't have mine epoxied together as they have the steel rod. The only mod I did was to cut two plywood U shapes that I put in over the root ribs to make sure the halves couldn't slide out.

Note that not all Avistars have the steel rod as the wing joiner. If you don't have it, then I seriously recommend expoying the halves together and glassing the wing center. I just took the view that anything which folds this 1/4 steel rod in half is pretty much going to be a catastrophic event anyway you look at it.

Duke