So if I purchased the snowboard skins, (the shop in my current town sells them but has no tech available to provide me info on setup) will I need to do my own trimming to fit to my billy goat split 162? Or do the snowboard skins come pre sized? I am just getting into splitboarding, having picked up my first set up last winter, but am still trying to figure everything out. Is it easy to cut and size your skins on your own? Especially since I have never done this before. I am quite handy though. I just need to figure out my best options and what I need to get done. Any help would be appreciated!!