I've been waxing my own skis for the longest time now, but I was always a little skeptical when it came to sharpening them. I bought an FKS file with a guide that had several bevels. I never tried it on my good skis, fearing I would damage them but I practiced on an old pair. The only thing I noticed was I made the file dull, a few shavings of metal came off, and the edges never got sharp. Perhaps I have the wrong file and holder? Basically what I am asking is what type of tuning items should I get to sharpen the edges and should I get some kind of stone? Also will a travel ski vise work like a regular three piece vise to properly hold the ski or not?