> 1. What maintenance/greasing/lubing I can do on my 'new' box to avoid headaches in the future
I am not aware of anybody greasing their box. I don't think it is necessary, and I don't think it's a good idea, because it will end up on your cat's paws, and it will be lapped up.
You do need the 'scrubber ring' in the base of the box, underneath the bowl. Make sure it is present.
> 2. If there's anything I need to look out for when moving my Cartridge Genius to the new head unit
Make sure the bowl turns smoothly without the head unit installed. With the brim installed, you should be able to turn it with one of two fingers.
> 3. Which cleaning solution (if any) people recommend these days.
Still Simple Green, or none at all in combination with warm (~55 degrees C) water. The latter has worked miracles for us during the past years. In addition, we have a water softener
installed, but I doubt the water is the main source of lime. It's probably the urine (yuk).
> 4. What the status of CatGenius firmware is. I went through the wiki and didn't see a clear