Richell PAW TRAX High Wall Cat Litter Box, High Sides Cat Litter, White and Lavender

Will this minimize spraying on walls? I have a male cat that urinates odd and it gets on the wall. I have to line the walls with plastic bags.

What are the actual dimensions of the item? Is the grate detachable and can it be left off?

Seems perfect except for the dumb grate, I would buy it if it weren't for that. Do you make one without it?

How tall are the sides