Is there a real good way to set up seat position on a Mountain Bike? I've been riding many years and can't seem to get the pain worked out of my right knee. It hurts right in the front of the knee. I ride hard and have a habit of staying in higher gears. Even when clinbing I often stay in the higher gears and stand up and hammer. The way I have been doing the set up is to sit in the saddle and with the peddles at mid position I take a plumb bob and set the front of my knee to just in front of my peddle axel. Is this wrong?