Cat Shelf Bracket for "SmartyKat Paw Perch," Or Build Your Own

This is for the widely available (sold at Walmart, probably also other places) SmartyKat brand Paw Perch that's “designed” to mount on your window and give your cats a place to sit, bask in the sun, and eck-eck-eck at the birds.

There's just one minor problem. I put “designed" in scare quotes just then because the wooden brackets it comes with are just a plain L shape. So this kit can't be used on any window that has an interior window sill.

Like, oh, I don't know. In approximately every single house in the known observable universe?

Apparently no one thought of that. So ditch those stupid wooden brackets and print a pair of these. This bracket includes a handy swoop that ought to clear most interior window sills and save you from having to pack this thing up and return it to the store. It fits the original bolts and bolt holes on the platform, and the through-holes are slotted to allow for a generous amount of adjustment.

Or!

Grab any random plank you have lying around and screw it to two of these bad boys and make your own cat shelf, artisinal-like, from scratch. Take that, vertically-integrated-globalized-manufacturing-and-supply-chain!

Oh, you probably want a pretty big printer for this. I can run these off one at a time on my Qidi X-Max 3, but you need at least a 280x280mm build volume or you're going to have to scale this down. If you scale it down, the bolt holes won't line up or be the right diameter anymore.