so i just bought a trek crossrip to build endurance for mountain biking and figured it get clipped in. i always ride flats on my mountain bikes and have never used clips before. after about 4 miles being clipped in i could really feel it in my knees. i pulled over, adjust the cleats and got back on the bike. definately better but today (went for first ride on crossrip yesterday) i can feel it in my right knee. im in very good shape, lift weights, do plenty of mountain biking, so i dont think its anything along those lines. my main question is how do i properly adjust the the cleats so my feet are in the correct spot? ive read a few articles about marking the sole of the shoe to get the ball of the foot on the pedal but i think my main problem is more toes in/out positioning. any help would be greatly appreciated