I bought a 14 m8000 with this on the sled. I repacked the drive bearing. I cannot find any info on how much tension. It looks real similar to a MVM drive, they recommend 1/2 inch movement pushing between 2 pulleys, so that is how I tensioned it. One video says 30 degrees on a c3, sure like to know how to measure 30 degrees with all the bull shat in the way.