I don't have this specific setup but I do have Progressive springs with a 1" drop done internally (before radials I had a 2" drop internally). I used an aftermarket valving kit by Ricor which has been a good setup for me. I also have the spring preload fork caps on my older style forks although I haven't done much experimentation with them. It makes the front end stable and predictable and while there are better suspensions I think it is just about as good as it will get, using RaceTech or Progressive springs with either RaceTech gold valves or Ricor Intiminators will get you there with your stock forks.