Hello, I have a pair of one year old Marker Duke 16's mounted to Rossignol Soul 7 HD's, also one year old. I purchased a pair of Solomon QST Pro 120 PR boots this season, and had them mounted by the technicians at Powder House in Bend, Oregon. with a DIN setting of 10 to reduce the chance of pre release. I weigh 160 # and my height is 5"10". I experienced a pre release anyway ( we called it " Markering out" back in the 60's); my ski left my inner boot at a high rate of speed on a Blue run, causing a hard crash with my right arm extended out...torn upper short head of the biceps and a bruised arm. I literally watched the ski separate, and thought, "this is going to Hurt". The heel piece was closed and had not released. The separated ski was 20 + yards up the mountain. I have owned Marker Duke 16's previously, last mounted to Atomic Trackers, with zero problems in three seasons. My concern is the interface between the Marker Duke 16's and the rubber souls of the QST Pro's. I skied down and had the bindings rechecked at the Ski shop located at Mt.Bachelor. I was told the adjustment was "close". The forward pressure was increased from the heel and the DIN reduced to 9. My thought is that this boot/binding combination should not be subjected to high speed/high pressure turns. I mostly ski the trees and powder, but I ski fast going home. My expertise is Level III; I road bike long distances in good weather and participate in spin classes twice weekly in the winter. My age is 70; I have skied thought out the West and in Canada and South America. My last serious injury was a spiral fracture of my right tibia at age 16 (remember the movie "Downhill Racer"? That fracture). I would appreciate your thoughts Regards, Louis Kosta