I get a kick out of anyone using the term BEST with most anything. Good is a better term. I would have loved to see anyone try to CG that Patty 35% Extra I had with there fingers. That one was about 35 pounds. How about last years Prime Cut I built, it was a light weight giant but the sheeting on the wing was so light weight a finger or something like the Great Planes CG machine would break through the wood.
I feel the electronic scales are a lot of over kill for the average builder/pilot but there are so many ways to balance a plane with just cheap home made balancers there is no reason for spending the big bucks. I looked at that nice blue CG machine and shuddered at the price. On a lot of my small models fingers work just fine, on some I have to hang them and use a plumb bob.
This Stick ARF I just assembled and set up CGed perfectly without any lead. I had it sitting on a GP balancer while I moved the gear around and just sat everything on the outside of the plane, marked it then hard mounted the gear.
Whatever works for you is the BEST way.
KISS!!!!!!