I'm a new Tormek owner. I just tried to sharpen Dewalt 12.5" planer blades. They turned out wavy. I'm not sure they were that way to start, but I'm having trouble getting a straight edge. After reading some other posts on this forum, I believe I might be a little short on patience. Just how long does it take to sharpen one 12.5" planer blade (in not bad shape to start with)? Also, how much force should I use?