Follow the directions, use the specified Amsoil weight oil, use your OEM springs, Progressive's and Ricor's do not play well together, cut your existing preload spacers shorter (hack saw and a mill file to square them up) exactly as much as you gain from the valve insertion. And call Ricor and tell them you want a price break and a custom adjustment to the valves for your anticipated rolling weight and riding style. They should be willing to nearly match the lowest price their vendors charge, they did me twice, anyway. BTW, to really get all the old fork oil out, you need to pull the forks and work them by hand (caps off, springs out) while they are upside down, I finish flushed mine clean with Diesel. Be really deliberate with a plan to re install the caps, cross threading them is bad. I had a helper apply thrust with a broomstick handle, turned the the cap backwards until I heard the click, visually confirmed they looked straight and tightened them up. If it seems like too much resistance to tighten, stop and re assess. One or two boogered threads is not the end of the world, if anyone ever needs one I have the proper knife files to rehab the damage. Just PM me.