Fan Duct for Geeetech Acrylic Prusa I3 X

Yet another fan duct for the DIY printer Geeetech Prusa I3 X Acrylic version. None of the things I found here fitted my printer, so I designed my own. Geeetech seems to change their printers without updating the model number. I bought mine in October 2017. The distance of the nozzle to the upper edge of the extruder carriage is ~36mm, the distance between the front face of the carriage and the nozzel center is ~33mm.

Print the three parts and then glue them together. Since this part will be c