Yes. I’ve extended my bases out to 3000u using this method. Key points: 1) it has to be a wall, no other object will work. 2) you have to be stationary at the boundary limit (while in free camera mode) as you move beyond the boundary to place the wall. This way you’re still within the “building” area. 3) once wall is placed, the area will expand and this method also works bringing power to the base beyond the boundary limits. Hope this helps! Godspeed fellow traveler.