40 x 40mm Extruder Fan Adaptor for J-head or Clone ED3V6

30 x 40mm Cooling fan Adaptor so you can install a 40 x 40mm fan, as the 5 blades on the 30mm Clone Ed3V6 fan does not push enough air across the extruder, resulting in the filament been to soft, and causing the filament to block the extruder.
Add support under the each corner of the 30 x 40mm adaptor, print from large side upwards..
With the Cooling shroud print on its edge, flat side down, add 1 support in middle of circle.