I have interesting one for you guys,
@GregK did allready give me pointers so I think we got it solved , but here is some info.
I started skiiing rossi ST for first 3-4 hours yesterday, then I took out my freshly stone ground & waxed m-free 108 .If I had the bases flat ski would just stop and get "stuck" if decent edge angle you could actually feel them speed up, but nowhere near what it should feel like. With rossi ST I was doing an easy 90kmh even with turns at the bottom of hill, and I had to do speedchecks to get speeds low enough to where I wanted to be for practicing my l turns, glide was good!
Now on the m-free 108 I straightlined the entire black run just to see, max was 73kmh, both where wax by shop with a 7 (their default after a stone grind) and it had that super sketchy Im falling forward on old dirty wet summer snow feeling, without it beeing conditons like that.