With different "good cg location" results coming from different people with the same airplane, is it possible that it is a result of not taking into account the sweep of the top wing coupled with the particular cg machine being utilized?

I am using a great planes cg tool, and I noticed that, due to the width of the 2 measuring arms, that the measuring pins set back 10mm from the center point leading edge (farthest point forward) of the top wing. This means I have to add 10mm to whatever I set the rulers at the cg tool in order to get the measured cg point. According to the Kyosho diagram, it shows 130mm from the farthest point forward on the top wing.

It looks like I'll need about 3 ounces of tail weight to hit 125mm (I have a Saito 82 sitting up front). I certainly want to hit the right spot as the 1st flight will probably be next weekend. From the discussions so far, I think I will set it at 115mm from the center of the leading edge.