I took the dial gauge mount from cmdctrl and made a new mount for my CR-10. You cannot take the extruder all the way down when using this, but it does allow you to see how level your bed is and what areas need adjustment. I put a rubber band on the dial gauge just because it seemed a little loose. Please feel free to revise this and make a better version. JB
UPDATE, the original fan mount blocked the fan completely. I have updated a vented version that will allow the fan to breathe while you level. You should always level your bed when it is heated and for the CR-10, the fan that this covers runs when it is on.
No supports on the Dial Gauge. The Mount has supports are Everywhere, Zig Zag, at 6%. comes out easy. Hatchbok PLA 195/60.