Vertex K8400 Fan specially shaped side mount with tunnel. Two files with wide and narrow outlet. it is mounted in the place of second head. I made a mistake while making the model so the M3 screws which keep the fan in place hit the belt in most outer position in X direction. To fix that I had to change in the printer settings X Max falue from 200 to 185 (Printer settings -> Printer Shape -> X Max). UPDATE New file added: Tunel_slim_v4. Super narrow outlet with improved flowpath design. The L-shaped side flowpath for isolator cooling is the same as in previous parts. This design is being tested. If you decide to print _v4 file I appriciate any comments.