Topic: another fan mount/duct :)
Heres my fan duct I made which mounts between the wood piece and the mk2 jigsaw mount. I printed all of them at .3 layer height and 20% infill. Feel free to tweak the design more or give some criticism as I modeled it up the other night super quick. It should work with other mounts as long as you can use the screw holes for the wood plate. This is for a 40mm fan fyi