Qidi Plus 4 4020 fan upgrade toolhead shroud cover

Final, tested, and working.

Option 1

• Separates the fan shroud from the extruder shroud like the original fan. 
  • uses new fan shroud with magnet that connects to original extruder connection magnet. 
  • also uses tab to align with tab hole, while still allowing extruder fan space to lift up.
  • uses pins to connect shroud to extruder where original fan shroud's screws were
  • uses pins to connect fan to shroud
• Extruder shroud attaches to fan
  • uses  four(4) 4x1.5mm magnets press fit into side of the extruder shroud and an additional four(4) magnets glued into the original screw holes for the fan, (I used abs slurry from failed prints mixed with acetone to secure the magnets)
• Increases the strength of the extruder shroud using Kameo's hexagonal design cues as reinforcement
  • created extruded borders around the hexagonal vents to increase strength
  • aligned the hexagonal shapes to match opposite side and align evenly.
• increases vents where 12v stepper would have been placed by using 24v fan
  • added hexagonal vent holes where 12v stepper would have been
  • uses a Sunon 24v 20x40x40 fan that's very quiet and has high air flow
  • or just tested, the gdstime 4020 and it works well, just note the fan wire colors are reversed, but should have no effect.
• aligns the “wind tunnel” output hole with the fan.
• has a completely removable faceplate held in with magnets so that you can get to the nozzle without having to remove the entire shroud.
• and two fan shroud options, 
  • one where the fan shroud screws into the extruder like the original, (use countersunk screw heads) and the fan is held in with magnets.
  • Another where the fan is held in with pins, and the fan is held in with pins.
• Also I didn't like the stock shroud's filament cutter hole so I made it attach near the rear so it's stronger.
• IF YOU'RE TRYING TO MAX OUT YOUR PRINTING SPEEDS USE THE SCREW IN FAN SHROUD OPTION

Option 2:  Changes the removable faceplate option, only has the pinned in fan shroud option.

• If you don't like that the extruder shroud isn't as stiff without the faceplate, there is another option where the faceplate remains attached to the extruder shroud
• In this file there is also a faceplate cap if you want to customize covers depending on personal use. I use it to indicate what filament I'm printing at the time so I don't have to open my filament cupboard.

• Separates the fan shroud from the extruder shroud like the original fan. 
• Increases the strength of the extruder shroud using Kameo's hexagonal design cues as reinforcement
• increases vents where 12v stepper would have been placed by using 24v fan
• aligns the “wind tunnel” output hole with the fan.