I've watched YT vids and I have a device similar to what you are using to keep the coals on one side of my grill for slow cooking. 5 hours later my ribs will look like yours but all the connective tissue is still holding all the meat together and its like chewing on leather. I really dont understand what I'm doing wrong. I gave up even trying cuz its a hell of a long time to waste only to not have it turn out. My wife can throw em in the oven for an hour or 2 and they come out amazingJust like soldering, it requires a bit of practice. YT is your friend.