The placing of struktures outside buildings can be quite annoying as they randomly hop around (especially in terms of hights) and sometimes cannot be placed without any reason (I'm just building a solar park on completely even grounds and there is a quite large area where its impossible to place smth though there is so much free space aound that i could build another solar panel between... and I checked the needed space between my other panels). and the manual change of hight with arrow keys only works downwards ... I dont know.Hope You can make things easier to handle
Thank You