I recently aquired a K-3 that's been modified to super-16. It also has a Tobin crystal sync motor installed. However, whenever I run the camera at 24 fps or 12 fps (the only two speeds on the motor), the image in the viewfinder is quite jumpy and blurry. Could this be a problem caused by the recentering of the lens/mirror? Or perhaps the speed of the motor is off? All help is greatly appreciated.