I used 5W fork oil and measured down from the top as the fork with the damper takes a little more oil from memory. I also seem to remember my spring being under little or no pressure when resembeling. I took out a 25mm spacer that someone had put in there before me. My front end was to hard when I got the bike and was contributing to the bike pushing wide when exiting corners. I am 190cm and about 95kg. The bike is now a little soft but comfortable. It doesnt bottom out under hard breaking. The most important thing is to get the front and rear working together. If one end of the bike is out of sync with the other then not so funny things happen in corners like pushing wide or falling in.
Go to . I found it very helpful. There are a couple of other sites on the subject that are really good too.
I have a few bits of road close buy that I know I can really hammer to feel how each adjustment effects the handling.