Summary

I found that the MK4 version doesn’t allow me to properly adjust the angle of my NVG set — even with the Rhino mount set to its lowest position, it still pointed upwards. So, I decreased the mounting angle by 10 degrees.
The geometry is pretty messy, but I wasn’t able to clean up the original .STEP file, so it is what it is.
Maybe the new angle is too steep, but I’m currently printing one to test it.
If anyone wants the Fusion file, let me know and I’ll upload it.