Blower Fan duct for PrinterBot Simple Metal, vertical, more improvified

Credit to SpannerHands for inspiration, and for his nozzle, which I have included here unaltered for convenience. (If you are looking at nozzle alternatives, you should read Desi Quintans nozzle study: http://www.desiquintans.com/coolingtests.)

However, I didn't care for the sideways mounting of the fan, so this duct moves it to a vertical and fore-and-aft position.

(Incidentally, I sliced this using pretty aggressive settings in Cura's Fuzzy Surface feature; that's why it looks... fuzzy.