I was watching my focusing routine of 7 points and I could see the optimum focus was almost smack on the third position. The routine carried to the end and then started over, as I assume it needs three standalone points to determine a slope, using a larger (further out) value as the starting point. It went out a bit too far and after 9 or 10 points found the focus position.
If the focus routine needs to be extended inwards, it just adds a few more points at lower figures.
My idea is, if backlash is enabled, can the focus routine simply add more points at the ‘long end’, rather than repeat the whole sequence? It saves some time. I may have asked this before but I do not recall the answer.