Printable 'spare' Ultimaker fan holder

After designing more variations than I wish to remember, of a fan holder to fit my UM, I discovered that the original UM holder supplied with the kit worked better in many situations.

Although it does not deliver a blast of air just to the tip of the nozzle, it does give a massive flow rate spread over a very useful footprint. Thus it cools the already printed plastic which is often missed by more finely aimed blasts of air when the head is moving at speed.

My goal was to design a copy of