Rear curtain fan for Rook Mk1 250mm

You know, for PLA. Designed to be used with my “alien ultralight” toolhead on a 250mm Rook Mk1. Uses a 120mm blower fan and m4 nuts and bolts (attach to the Rook with normal M3 bolts). It's in two parts to try and reduce the amount of support required, but there's no really nice way to print it, sorry. Glue the duct on to the frame with superglue, attach to the blower fan with HVAC aluminium tape (or just superglue that too…), then bolt everything together.