I wonder what the First version of the Droo home base looked like

Im talking about the home base from when droo was called "smearth" im not making that up it was actually called that just look at andrew garrisons old posts

Does not exist anymore. The eldest available is just the classic droo and not the first shown @Dereric

The old base is there, even in the last version of Drop, but now it's called legacy base.

I'm talking about the original original one that's not in the game anymore with the shorter runway and no landing pads

you can play classic droo system by creating a new save and select "classic droo system" or something iirc. Also, old part are not lost, you can find them in website and save it through sub-assemblies