I own a few Vist plates (plastic ones) and locked the back, no screws in the middle and float the front. Has anyone experimented with different mounting combinations (e.g. float front and back, locked in the middle or lock front, lock middle, float back), and did you notice any difference in board characteristics during snowboarding? Looking at my Vist Flex plate it's locked in the middle and front and back floats, so perhaps i have to do the same with the plastic plates?