I found that when I printed anything taller than about 100mm my bowden tube and the wires wrapped around it would rub against the upper frame rods. this custom mount raises the extuder drive higher and rotates it 90 degrees so that the extruder motor sits above the left hand Z motor, the bowden tube and wires now run between the upper frame M8 rods and doesnt rub. this also allows me to reach maximum hight :)I printed mine in ABS at 0.3mm layers with 3 shells and 40% infill the holes may need clearing out to fit fit to upper frame using 4 M3 x 20mm bolts and nuts washers optional fit extruder to mount using 2 M3 x 25mm bolts and nuts sorry no pics yet, my camera is having a bad day