I just started skiing this year, and I love it. I really want to go to the park, but everybody says not to because I'm newer. So far I've gone once, and without any lessons I'm carving and doing pretty well. I was watching some videos of people jibbing in their backyards, and I wanted to get something going. My dad doesn't want me to though because he thinks I'll ruin my skis. The rail I would make would pretty much be a box I guess with a few PVC pipes laid across a 2X6 or something lengthwise. So I would be sliding a box more than grinding a rail. Would this hurt my skis in anyway? I can't afford to have to do any major repairs or anything. Any help is appreciated.