I have been building a roof over the heads of guard posts for enough years that I finally broke and am here making a post requesting a single object to place. I have been doing glass enclosures ( its been 210 years.. no point building new junk when you've got industry going again right? ) If this guard post could potentially have a square shape rear so it can snap into say the corner of a building serving as a roof, but also has its own very short tunnel that can sync up with other settlement structures.. great!! Really even so much as a canopy for the existing guard posts would be a step toward better immersion given radioactive rain in all.