Well went out this morning and did some testing with 20.5" blade on my cone balancer since I had a some spare time. It is just as accurate as the scale n post #15 if not better as I weighed the nuts is took to get any defectiion. One got the blade move off level but took two of the nuts to get my digital scale to register the 1.5 grams of both nuts so I seen this movement at 10" with .75 grams. Not bad for a $2 tool. Also found the blade was only 7 grams out balance @ 10" which is a lot considering the amount the tip was showing out balance by.