I got a marzocchi marathon xc, and i have done everything in my powers to stop this thing from clunking when i hit small repetative bumps, usually going over 15mph. tried setting the rebound in pretty much all the settings from none to full. right now i have it set at the 120 mm extension. Tried going from 20 psi to 80 psi. My sag is 15% at about 35psi. i even tried reducing the whole travel of the fork from 105mm to 120mm. nothing seems to work. Any Ideas? thanks.