Thanks Dave, that cleared things up a bit. So, as for springs selection, my current front sag is at ~30 mm, race sag at ~80mm. I haven't actually measured it, just a calculation. My race sag with stock 4,2N springs was 100mm, and with two 4,6N springs it was 65mm, so I guess now with one stock spring it would land in the middle of 100 and 65 mm, ~82mm. Am I all set here?
So, basically what you are saing Dave, assuming my sag is right, is that all my previous problems with spikes and bike deflecting off any kind of rocks, is all caused by high oil level?
Ok, I'll give your formula a go, Dave. It's fun to tear down forks!