A remix of the base for the popular bullseye duct.
This creality base allows you to fit the hotend cooling fan without screws, and easier access to the bowden tube fittning. Slightly larger holes for the nuts to make them fit better.
One base with a caliper mount and one without. Together with some g-code the caliper can be used for bed leveling assistance. For leveling see https://www.thingiverse.com/thing:3204245

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