Magnetic Mount for a Nozzle Scrub Brush or Wiper

I used two of the magnets from the original build plate of my max 3 (since replaced with a magnetic sheet) to make a mount for a nozzle brush/wipe. The magnets are 20mm x 3mm. I superglued them to the inside of the holder and superglued the end of a wire brush to the top of the holder. I placed it along the x axis in the rear left corner because I have a cartographer and I didn't want the brush to contact the probe, but obviously you can place it anywhere on the bed in any position as long as you adjust the coordinates. 

I'm using the below macro in the print start gcode in the slicer, right before the cartographer touches the tip of the nozzle to the bed to set the z offset. It heats the nozzle up to 170, performs however many passes you want (it's set to 3 passes in the macro), then turns off the nozzle and in my case moves the printhead to the middle of my bed 10mm above the build plate. 

[gcode_macro NOZZLE_SCRUB]
variable_start_x: 5
variable_start_y: 317
variable_start_z: 21
variable_extruder_temp: 170
variable_extruder_end_temp: 0
variable_wipe_dist: 40
variable_wipe_qty: 3
variable_wipe_spd: 80
variable_raise_distance: 50
variable_end_x: 165
variable_end_y: 165
variable_end_z: 10
gcode:
    G90
        # raise nozzle to ensure clearance over the brush
        G1 Z{raise_distance}
        # set extruder to scrubbing temp and wait
        M109 S{extruder_temp}
        # position nozzle to the left side of the brush
        G1 X{start_x} Y{start_y} F3600
        # move nozzle down so it contacts the brush
        G1 Z{start_z} F1500
    # perform wipe_qty number of wipes
    {% for wipes in range(1, (wipe_qty + 1)) %}
        G1 X{start_x + wipe_dist} F{wipe_spd * 60}
        G1 X{start_x} F{wipe_spd * 60}
    {% endfor %}
        # set temperature to end temp and do not wait
        M104 S{extruder_end_temp}
        # raise nozzle to ensure clearance over the brush
        G1 Z{raise_distance}
        # move printhead to the middle of the build plate
        G1 X{end_x} Y{end_y}
        # move z to end position
        G1 Z{end_z}