Re: Mind Flayers.

No offense, but it seems pointless to me.  Illithid society was fully
developed in The Illithiad, and mind flayers have always (back to Basic/Expert) had 4
tentacles--the ullitharid, with six, was a later development when they wanted
a very rare leadership caste.  You're naturally free to do as you like in
your campaign, and 3.whatevere may even fully support what you're doing, but for
a telepathic race major physical differences don't seem likely as a solid
caste basis.