The only issue I see with that is it isnt for cats under 5 lbs according to their site. It sure looks like a pretty good design though.
I think I will look for that basic model you are using.
What kind of litter are you using with it?
I've been doing research on littermaid, and it seems the new models dont work as good as the old models. I figured, maybe I can find a older one on ebay, but I am not sure which models are considered good. Anyone here using one without any real issues? I shouldnt have too much issue with...