If you don't know the difference, you might want to hold off on telling people where to mount your bindings. However, if you did ask, then they should have complied. The dynamics of a ski when in an arc vs. trying to land and take off switch is the trade off you are going for with the altered mount. If you are going to use the ski mostly for jibbing then a true center mount will be better IF you are going to be doing a lot of switch skiing, if not, manufacturers recommendations usually gives you best results.