Another quick update:
-added few more things to the main refinery (they may not be noticeable)
-redid some things on the Harvester to make it look more like a tanker wagon/truck
-minor material, lighting, and misc. adjustments.
I’m getting close to being done. 
Thanks!
https://s27.postimg.org/hyo0b0p0j/Sci_Fi_Farm_Harvetsers_7th_pass-_1.jpg
https://s27.postimg.org/ph75jngdf/Sci_Fi_Farm_Harvetsers_7th_pass-_2.jpg
https://s27.postimg.org/8s5pnqjs3/Sci_Fi_Farm_Harvetsers_7th_pass-_3.jpg