RagnarDannesB

I litterally did this, jumper and all, it worked like a charm. I have a combo switch with both 3-way mechanical switches and Claros on the other wall.

I have the same switches. What I did was use Lutron Claro/Diva switches on the other side of the 3 way and let these stick around as mechanical switches.

Those smart switches work with 3 way switches with only one of the switches being smart.