Need construction advice


I am playing SP. I’ve built myself this outdoors crafting area:

Now I want to roof it for aesthetic purposes, while keeping it wall-less. The only way I have found so far is to do what I did to my outdoors storage area:

But this is not nice. The support pillars can only be set in the center of a foundation. For my crafting area this means making all the corner squares useless and moving the crafting stations. Apparently there is no way to place pillars on the corners of a foundation, as is possible in other games like Wurm:

Here the support pillars are in the corners, leaving 100 of the square available for whatever you want to use it for.

Is there a trick in CE to place a roof over this crafting area and at the same time:

  • not have walls
  • not have pillars waste the corner foundations, and probably some it between the corners?