Following the purge bucket for the Geeetech A20M, i decided to do one for the CR-10S Pro as well to be used with the Palette machine.
Prints without support and uses the same existing screws on the X-axis bracket to get attached to it.
You'll need a wire brush (http://geni.us/wirebrush - affiliate link) cut down to size so it can fit inside the slot, to be used as a wipe area. i just used a hammer and a long knife, then sanded it a bit :)
i like to also include some aluminum tape inside so the purged material doesn't stick to the bucket. I am also including the Fusion360 files for those who wish to iterate as i am not sure how it will fit on the CR-10 and CR-10S just yet.
P.S. make sure you include M211 S0 at the start of your gcode script to enable the nozzle to travel outside the bed area and the include M211 S1 in your end gcode to enable the limit switch again.