Originally Posted by Noodler
I have multiple sets of Markers - both Piston Control and Piston Control Turbo. These are the NON-system type that are mounted to a flat ski. I do my own mounts so I know exactly what's going on with these bindings. The toe and the heel are screwed directly into the ski through the plates. There is absolutely no way either piece can slide whatsoever with my bindings. I'm not sure what you're seeing on yours, but I believe your impression that the toe can move is incorrect.
You are talking about different Marker bindings. The Ti-Piston 1200 bindings that volklgirl was referring to (and the 1300, 1400) attach to flat skis in these steps:
1) a toe guide is screwed to the front of the ski. The guide contains a greased metal track.
2) the toe binding (which has a mating track on the bottom) is attached to the heel binding via a center bridge, using notches in the bridge to set the proper sole length. Let's call this assembly the binding "unit".
3) the front of the binding unit is slid onto the toe guide track and positioned correctly.
4) the heel binding is screwed directly into the ski
So, the toe binding is contained in a track, but not directly fastened to the ski. The toe binding can glide fore/aft as the ski flexes around it.
Here's a pic:
The front piece with the "1300" on it is the toe guide, which is screwed to the ski. The toe binding above it is on the sliding track. You can see the gap between the toe guide and the center bridge, which opens and closes with flex. On the heel piece, there are traditional Marker mounting screws -- under the brake, and in the back (near the "eps" logo).
Edit for another factoid: the piston is in the center bridge, with a strut that runs into the toe guide. When "on" the piston is connected to the guide, so that the piston damps the sliding motion. When off, the piston is not connected to the guide, so you get free-flex.