Hi, my problem is balancing spinners and props. I have two balances: the Top Flite magnetic balance and the Du-Bro balance. I'm finding it very difficult to arrive at a good balance. Please, folks, will you look at my method and suggest better ways or improvements.

I find the Top Flite magnetic balance excellent; but too sensitive and unable to balance a spinner without drilling a hole in the spinner nose. So I am concentrating on the Du-Bro. In the configuration I have with all the weight hanging over one side, see photo, it is not very consistent. So I am using a very crude statistical method.

Since there is distortion of the spinner and its back plate when screwed together, the assembly, I think, should be balanced together. My object is to chase the lightest parts through repeated tests, adding small balls of plasticine to the backplate at the indicated point after each test. When and if I am satisfied with the balance, I will drill small holes in the backplate directly opposite to the plasticine balls and remove the plasticine.

The backplate is marked into 12 segments just like a clock. I spin the spinner gently clockwise or anti-clockwise with the 12 o'clock marker at 12:00. It will stop with this marker somewhere else; perhaps the 3 o'clock marker will now be at the 12:00 position. As a result the 3 o'clock marker show the lightest point in this spin. As my configuration gives inconsistent results, I need to repeat the spin 10 times clockwise and 10 times anti-clockwise.

In the chart image, the sequence 11, 8, 4, 1 ... says where it stopped after each spin. 11 means it stopped with the 11 o'clock marker at the 12:00 position.. In the chart, I draw a blob for each of the numbers from the 10 + 10 spins. The result in the chart suggests that the lightest point in this test is between 8 and 9 o'clock. So I will add a small ball of plasticine and run it all again to see what happens.

Any and all advice is very welcome.
Best wishes to all
Mike