Re: Drumdial/Tama tension watch settings?
Don't think it matters really.
The dials are essentially an engineering measuring device for machine tooling etc.
They are adapted for drum use. If the springs used are of even a slightly different tension, and they will be, in the same model and make of dial, you will get a different reading between dials. They were not designed to measure pressure (the head) but flatness/depth.
But, as I say, It matters not. The dial will make it easier to get even tension at each lug, and that helps hugely with tuning.
All the tension figures quoted are ball park. Try them and see what suits you, then write them down. As long as you use the same dial, and same readings every time, you can replicate your sound.