pic: Omni Design Trial

[MrForbes]

It looks like a neat design, I wish I could use Inventor so well!

One comment on the drive choice, it seems to me that omni drive like this has a lot of "wasted motion" since either all 4 wheels are always turning at an angle to the direction you're going, or two are going in the direction of movement and the other are not turning at all. I suggest you look into changing to a mecanum drive setup, the only substantial change to your design is that you would rotate all 4 wheel/motors 45 degrees so that the wheels are parallel to the long dimension of the frame.

Mecanum has an advantage with this type of game, where you will probably spend a lot of time driving straight ahead, and in this situation the rollers on all 4 mecanum wheels do not rotate relative to the wheel body. With mecanum, you only have "wasted motion" when strafing (sideways) or rotating the robot.

(if you've already ordered the omni wheels it might be expensive to change now though!)

Also mecanum programming is something your team should be able to do, there are several code examples on the web that you can use to make it work.