Clevercat redesign ideas?

I thought I'd post some ideas on how I'd like Clevercats redesigned, maybe others can add some ideas and then I can create the box and make millions. Firstly I'd like it to be a bit higher, 2 or 3 inches, my boys look uncomfortable when using it. Also I'd like the bottom of the box to have square edges, I sometimes have problems scooping pee clumps out of the corners, this was especially a problem when I was using Sweatscoop, most scoopers have square edges so I think this makes sense. I'd also like the logo removed from the lid, it's flat so if my cat lands on it when leaving the litter isn't released. Can't think of anything else right now.....

I used that one for a while... I loved the hole in the top but my cats hated it. the female revolted and started peeing outside the box. I used the liners and tossed it out every single day!

One of my cats doesn't like it as well so I had to cut part of the top off, I think if I were to redesign it I'd leave a bigger opening like the picture below.

Or maybe like the box on the right but instead of the side grate, a removeable extended wall used on the side that isn't against a wall.

My cats like the Clever cat but it being about 3 inches taller would be wonderful. I would not mind it being 2 inches wider either.