Look at the scale
ok, had a quick go before work this morning (I was late btw), and quickly pulled this together. I couldn’t quite put my finger on it before today, but it is all to do with scale. I know how much to move the nipple key to get the desired movement on the analogue dials, it’s automatic. The tv screen is big and I think I was ever so slightly over compensating my movement. The distances are small, the screen is big!
(This reminds me of an episode of “Father Ted” when he is trying to explain to Dougal that cows in the distance and cows near are the same size and it’s called “perspective”. If you have never seen this comedy series do yourself a favour and watch it. It was made by channel 4 uk and called “Father Ted” funnily enough!).
I have set the box to 0.2mm, the shading is the movement outside of this, most of this is the joint. When the dot is in a quarter of the box it will either be to low/high and/or right/left. You know if the spoke is too tight or loose, and can make a slight adjustment and quickly see the effect it is having on its neighbour's just by its position.
In short you need to calibrate yourself and then it all comes together. Marvellous.