Use two long Rigidbot extruder 45x3mm bolts to mount the root stand to the aluminum plate. Use one RB 25x3mm bolt to mount the clamp to the root and through the root to the stepper. Use 11x3mm bolt to mount the clamp to the root.  Use one 11x3mm bolt to mount the root to the stepper. Use two e3d fan screws to hold the fan onto the clamp face. STL, DesignSpark Mechanical (original), and Sketchup export formats provided.(Update reduces bolt head countersink depth.  Adds space for guide tube collet at top.  Changes units to millimeters rather than meters. V3 adds BL-Touch mount. Probe tip is 0.25" x 1.5" offset from hotend tip. For ABS I print 103% scale.)