When you say Omni drive, what are trying to say?
Are you thinking about a Mecanum drive? That will be hard to do, since there are not Vex Mecanum wheels (unless you fabricate your own)
Are you thinking about a Holononmic drive? 4 wheel 90 degree offset. That would be four omni wheels, one on each face of a square bot.
Are you thinking about a 3 wheel 120 degree offset or Kiwi drive?
This is a good
drive description video
Thanks!
Foster