I just ordered a digital scale to check the weights on my bowling balls. The gameplan is to use 1 scale, setup a dummy scale the same height as the scale X distance away and make a frame to hold the ball. If the ball is placed exactly halfway between the contact points of the frame and the scale and dummy scale 1/2 of the ball weight will be read on the digital scale. The scale is supposed to be accurate to .1 ounce. This might be a + or - accuracy, I don't know yet. The scale cost $45. A question though, what is the accuracy of a dodo scale? I assume it's better than the digital scale.
Dick