One of my males, Specs, has peed from day one. He totally ruined my dining room server, to the point that the wood was warped and the doors couldn't close. I bought new dining room furniture and now he's started doing the same thing to my buffet. So, as much as I hate to, he's back on amitryptilene. I don't like to drug my cats but I will not allow them to ruin my furniture again. The last suite was old but this is new and I'm not independently wealthy that I can keep replacing furniture. I admit to not having read all your posts, so I'm not sure if you mentioned trying medication or not. But I went with Feliway, tin foil, water guns, double sided tape, noisemakers, more litter boxes, the whole bit. None of it worked. Until amitryptilene. It keeps him calm. He's not a zombie, just calm so that he doesn't spray. Hope this helps.

Blessings,
Mary