Ever tried wrapping them in foil partway through? I had the SAME problem until I started doing that. After a few hours on low heat, I wrap them tight in foil with a little apple juice for about an hour. It basically steams them and makes the meat SUPER tender, no chew at all. Then I just take them out, sauce them up, and let them cook uncovered to get sticky.

Your wiring project needed a unanimous verdict from the internet jury!