Been experimenting with making D1/2 style robot sounds.  All are modified animal calls (like the original sounds).
I should mention that these sounds are made with the TEW robots in mind, as if TEW becomes the main mission in a standalone D2X-XL, it will need new robot sounds.
So far these are the robots I've had in mind (will expand this list when I add more).
Robot01: Komodo
Robot02: Gatling or Terrapinner
Robot03: Mantid
Robot04: Meson

I suppose I should test how these sound in-game .