On the stock original Avistar it is not critical but on an Avistar that has anhedral rather than dihedral it would make a tremendous difference.

Another example would be an (as original) low wing plane like a Kaos. You have to balance them up side down so more mass is below your balancing device pivot point. If you do it at the wing tips, there is less mass below your pivot point.

THE END RESULT by not balancing close to the fuselage and not having more mass below the pivot point would be over sensitivity of the balancing process and the multiplication of error. You would be trying to add nose weight but then you need tail weight. You can never find the correct spot. The plane will always seem out of balance.

It is best to get yourself accustomed to balancing up close to the fuselage for these reasons.

If you want a real aerobatic Avistar you need to try one with the dihedral reversed with the wings drooping. Looks weird but they are better balanced for the full realm of arobatics.