As many here know, I switched to the Dodge Boot this year. With the switch I went from a 313mm BSL to a 305mm BSL. This means that I had to adjust all my bindings for the shorter BSL. I had mounted my Icelantic Shamans with some Look P14's with wide brakes and when I moved the heel piece forward by almost a CM in deep snow I really noticed a difference. I had them mounted on the line which is probably fine, but for deep days 1cm to 2cm behinnd the line is better and I only ski these on deep days. Now I am 1 cm in front of the line and the difference is very noticeable and not good. I just took the Look bidings off and replaced them with some railflex demo bindings. These give me the ability to not only slide the whole binding fore and aft by 1.5cm but I can also adjust the toe and heel fore and aft by close to 3 cm. In other words I have ultimate flexibility to find the exact mount point that works best in the conditions I am skiing. I am asking myself why I mounted these skis without adjustable bindings becaue I know that it takes playing around before one finds the right mount point.
With carving skis I have much less of an issue and if it has a crve plate then I can easily change the mount without needing to drill. My IM 78's have railflex bindings and these work great and it was very easy to adjust them for my shorter BSL.
At the end of the day, it seems t me more and more that railflex, Power Rail and demo/adjustable bindings are the way to go, from the start especailly and on any wider skis. I know we had a thread about this a while back and I agreed with this thinking then and the I went out and did the opposite. Silly me!! I am now totally on board for this and everyone should consider this with all their fat skis.
The difference between a perfect mount point and a poor one can be very significant!!