Update: I just discovered a third switch dowstairs that I'd never used before. So this is actually a 4-way setup, which won't work with this kit. Bummer. Has anyone figured out how to get 4-way...

Hi all, I am strugging to set up my KS230 kit. I've installed Kasa smart switches for all the single-pole switches in my house, but this is my first 3-way setup. This pair of switches controls 3...