Its funny but I haven't done much to my shock other change it out for a previous gen spring and I did same as you dialed back the pre-load. Seems fine for my RED Group track days. Can pretty put it anywhere I want. Outside passes-NO problem. I dont think I have even really fiddled with the rebound/comp thingys. My front end is stock except for .80/.85 KTech springs. Prob need heavier oil but just been too busy to change.
I was at NJMP yesterday and probably passed more bikes on my N4 then my GSX-R 750
From what bike did you get your spring from? Looking for a 90 spring as it's the best for my weight and riding style