Yeah, she's two and half years old, but my son at 4 has always been cautious, she's not, lol.
Anyway, back on topic here. I resat my lens, did FoCal AGAIN, and went out for a test, turns out FoCal was way off. I now went from a +1 at 0,4m to +11, and from -3 to +9 at Infinity, and now the whole scale seems more in tune;
+11 @ 0,4m
+17 @ 0,7m
+11 @ 1,5m
+9 @ Infinity
And even though it's foggy outside it works quite well, indoors the same. It misses from time to time, for no reason, but it's more in focus pictures now and they are also evenly sharp. I think this will be an ongoing process, as it always is, but I think I'm getting there. So cast my rubbish calibration skills aside and it's beginning to turn into a winner here. Just expect a few wtf-misses, and it seems quite dependent on the type of light and the level of contrast and light, more so than any other lens I owned.
I have not tested anymore tracking today, so that is still an open subject.