I actually thought I had built what I could out of my old LEGO, but I had the big shovel for the Space Dozer and the gray “post box” for the Surface Transport, so I tried to rebuild the two.
And now I remember why I hate the Space Dozer! The big shovel keep falling down as it is loose. I’ve added a 6×1 tile underneath to support it.
6847: Space Dozer (1985)
6823: Surface Transport (1983)