Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:4426090.
I remixed this great thing by kulfuerst with a scallop in the right hand side to allow more clearance for the heater cables in some of my compact 4010 fan duct designs. I also included an additional amount of material to the top edge of the duct to provide some additional strength when clipping. It may be better to attach the fan prior to clipping to the heatsink has the fan fixings will reinforce the part
I have found the additional clip enhancements for the Dragon provides improved grip to the V6 heat sink. I have not yet tested sufficiently to comment on the longevity of the part but if the fan is doing its job printing in PETG or stronger should be sufficient.
Printed :@ 100% infill with Amazon Basics Red PETG