i must admit i still use the fingers for balance and all models seem to work out fine c.o.g. wise but i would say the balancer would have to be abit more accurate as you can set the exact distance plus the small nipples on the rods would be better than say a fat finger that may be curled to take the weight of the model. try your finger test of cog with the fingers dead straight like pencils and see if theres any difference between the two methods.