30mm Fan Shroud Rostock Max V2

Fan shroud is for a Rostock Max V2 printer.
This shroud eliminates the expensive 90 deg fan so you can use a cheap 30mm fan and you can use three fans instead of one. I made the fan holes a little oversize but it still prints too small. I think I drilled mine .093"(3/32) (Test in a piece of plastic first). The mounting screw you can just use #6 x 1/2 long sheet metal screw. I kept the air from blowing on the heater tip because it seam to cool it too much.