RatRig VCore 4 Toolhead Fan Mod

The original design left the wires for the Beacon dangling below the toolhead. Occasionally the wires would snag on a bad print. This modification simply increased the depth of the channel and adds slots for zip ties, so the wires are now flush with the bottom of the toolhead. The channel depth was increased 1mm so I doubt it will cause any airflow problems, but I haven't verified that.