I tried not to look but I just had to. I'm SO glad things seem to be better for Lucas. Reading this forum is like going to a scarey movie and peeking through your fingers. (Well for me,anyway)
I had a thought, Jen, if the on-carpet pooping continues, could you try spreading some paper around the floor with cat litter on it so at least Lucas gets the idea that the correct place is somehow associated with cat litter? Something about bringing the mountain to Mohammed springs to mind here!
Either way I hope he continues to make good progress to a full recovery or at least comfortable management for you both. Best wishes.

I'm logging off now, I can't read any more tonight, it makes me feel wretched. Goodnight everyone.