Bukoschnozzle Circular Fan Duct

A PLA cooling fan duct for a Bukobot with a Bukoschnozzle hot end and initial X-carriage version (with plastic printed linear bearing holders rather than the new all metal design). It should work with either a Vanilla/Green or Duo and with either version of the Bukoschnozzle wooden hot-end insulator design.

One of my design goals for this fan was that it had to be unobtrusive and so it mounts up underneath the X carriage between the two steel rods. This does mean that the top of the fan inta