I've got a 5" rhino filter I use outside the tent idk they know they done that, thanks for sharing.Oh, on another website I found this bit of info about Rhino filters:
To ensure the full lifespan of the Rhino Hobby filters, you must swap the duct flange and bottom plate from one end to the other. This ensures the carbon is used at an equal rate and the lifespan of the filter is increased to its maximum. This is recommended every 8-10 weeks.
Maybe the duct flange is still in the box or is missing from when you bought it?
Sure looks like you could take out those screws and flip around that insert.Your flange was installed backwards I think