I've been running one of these for about a month now. 170mm Fox 36 Grip2. At 52psi (with no RUNT) it was Ok off the top but midstroke was too soft and I could never use more than about 150mm travel even on fairly hard hits. With Runt: At 45/90psi the midstroke was crazy stiff and I was bouncing off everything and it hurt my hands. At 40/80psi it was super plush and nice but used up too much travel and too much sag. At 45/70psi so far it seems just about right. WIth the runt the midstroke support is...