So I'm sure this has been hashed out many times before... Although I could not find much information on tuning these forks. I found a tuner in Cananda (I'm in the states) from a Gas Gas forum that was offering piston and valving kits for the Open Chamber Marzocchi's. I have fought this fork for the 4 years Ive had the bike... fluid weights, heights... clickers... no deal. This thing was down right dangerous on Square edge high speed bumps and almost unrideable on high frequency small slow speed bumps. I tore down the forks and did the basevalve mod with piston and shims and re-shimmed the mid and rebound valves per his recommendation... The change is unbelievable..... Really, like a brand new bike... I am riding a full gear higher on the same trails without knowing it. I would highly recommend Riders Edge suspension for the do-it-yourself folks.