Ender 3 Hemera Mount w/5015 fan, BLTouch, & Marlin config

I found E3D's mount because the points for the screws were too thin. When assembling I found out that it also needed shorter screws than I could find so I killed two birds with one stone. I love the fan duct but I don't like adjustable mounts when using a BLTouch, I prefer somewhat repeatable offsets, and also found the duct sat too low even when adjusted as high as possible.

There were also some FW changes missing from E3D's guide so I thought I'd provide the ones for my setup.

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