Automatic Litterbox Central

I took a look at the Omega Paws at our local PetCo, and there was no grill on the display unit. Can someone describe where the grill goes and how it works when the unit is tilted? Is it the same principal as the LR, where the clean litter goes through the grill and is trapped on one side , then the waste rotates into the collection bin, then the clean litter is released again?

There must be a grill in the unit. Probably someone just took it out.

One person on the forum gave this link illustrating how this litterbox works:

http://us.f2.yahoofs.com/users/4059eb77 ... ABjJSvEk95