A simple adaptation of Predy's excellent MAD adapter, to add support for the stock 4010 part cooling fans found on the majority of printers.
Prints with minimal support (Only on the slots for the base of the fan, this is not imperative as you can trim overhangs with a knife if needed)
0.2mm tolerance around the fan slot
Designed to be press-fit but holes placed for stock fan screws if needed.
The author remixed this model.
Modified file to support a 4010 fan