The Litter Robot 3 is a well built and well designed workhorse. I think they cost a little more new than your budget, but they may have a model right around 500.

Depending on your comfort level with the idea and where you live, you can sometimes find them on the used market for a couple hundred dollars, or even occasionally a free non-working unit. Replacement parts are easy to get and install.

They have a WiFi model that can use an app to alert you when the tray is full or something unexpected happens, but it works just fine without the app or internet.

Do you have a single MGN rail on X or two? It’s easy to end up with twist on dual X rails that can be a bugger to try to straighten out.

Also, are you doing a good heat soak before printing, and do your probe results change at all before and after heat soaks?

If you’ve got a beacon on there, it seems like it would be well worth cranking the probe points way up.

If it’s simply bed adhesion, definitely give the dish soap method a try if you haven’t already.

This article reads like AI slop.

Tuxedo is continuing work on a Snapdragon X-Elite laptop but haven’t released it yet because Linux support is lacking around the SoC. They’ve made some device tree commits around it to the kernel. That’s it. Saved you a click.