Hello Jim - it sounds like you are in a pretty positive and steady place. Glad to hear you are finding work rewarding, and you seem pretty settled in terms of your feelings towards your W.
WRT D4, I'm not sure whether you read the stuff that Mozza posted about his technique with the kids - of really, really making them feel that they have been heard. I was interested to read it, and he thought it had made quite a difference....just in case that's of interest. It was what popped into my head when I read your post above.
I agree it's probably best to just try and tackle it yourself if you can. Things have warmed up a little with your W, but she may take any convo as inference that it's the sitch (ie 'her fault') that has caused D's behaviour to change. Just MHO anyway, and I'm by no means an experienced parent!!
Glad to hear you are doing okay, and hope you manage to get things sorted with your knee soon too. Take care Jim :-)
T 13 M 7 Me 48 H 46 SS 15 BD 7.14 PA D final 5.16 (H filed)
We receive & we lose, and must try to achieve gratitude & embrace with whole hearts whatever of life that remains after the losses - Dubus