Our CH kitty, Nemo, struggled with the litterbox too. We finally found that it wasn't the boxes, but it was the litter. Any litter. So, we decided to try incontinence pads (like puppy training pads). We put a pad out in front of the litter box and Nemo gets on it, with his front paws in the litterbox, and pees on the pad. He is usually very good about staying on the pad while he pees. The litterbox provides support for him without actually having to get into it. We get our pads at Sams Club.