Still based on tek's mk1 design and developing the mk2 derivitives of Jeffery Sanders.Featuring new easy clip on/off accessory mounting system.Print all parts at 50% fill or greater for strength.Tensioner arm may require extra perimeters to eliminate gaps.Dial indicator mount has 8mm diameter opening to suit my gauge. Modify the SketchUp file to suit your own.Instructions can be found here:http://www.soliforum.com/post/8877/#p8877Dimensions in mm.