This is a modification of Geodaves 12" frame. I had some issues with bed travel limits using the tensioner. I redesigned without the tesioner and added some supports to prevent warping when you get the belt tight. I also added some sorbothane vibration isolator mounts. tested and works! 7/5/15 UPDATE. Made the mount a little wider to match the original specs of the frame. Previous model left the wheels a little sloppy in when the bed was all the way forward. Also added a nut trap and countersunk the i3v logo some more.