Searched but couldn't find a directly related thread. I know the FAA says "up to 90 days" for a response to an altitude request through DroneZone but does anyone have direct experience with say a 60 foot request in a 0 foot grid? And please confirm that it is not possible to request any altitude through LAANC in a 0 foot grid even if LAANC airport. I did not see that option hence the DroneZone question. Part 107 request to do roof inspection about .7 miles from end of runway class D.