the demo plates are super heavy and kills your skis swing weight
Im pretty sure a Salomon Demo is a Salomon Demo...for ever. You cant take that adjusment track off and remount. You have to keep it and adjust it where you want it or remount with something else.
If you can get them to a setting you like, without remounting...close to center Im assuming for park, then ride them until you break them. Then get new stuff! But if you find something cheap that you like, remount them. Its personal choice I guess. I had to rent skis a while back because I maimed my other skis at the time and had AR5 rentals, I found the demo binding had lots of movement, twisting, creaking, that kind of thing. Just my .02 cents..