I'm glad too see you took advantage of their Black Friday sale.
In addition to what tskeeter stated, how much smoke are you applying? If you use too much smoke you will get a strong bitter taste. Some refer to it as licking an ash tray. Have you ever tried making ribs in the Bradley, or your only experience is with cold smoking?
I'm guessing you like a very mild smoke flavor. I have the GMG Jim Bowie Wi-Fi for over 18 months. One of my biggest complaints with the pellet grills is I don't get enough smoke flavor. I've tried running it a 150°F for awhile to get some smoke flavor, but that didn't seem to work. To get a good smoke flavor, sometimes I start my food in the Bradley then transfer to my preheated JB, I usually do this with chicken. More often than not, I will use an Amaz-N-Smoker tube for additional flavor. My other complaint is the occasional soot problems, but I have that problem mainly under control.
Though you can make good ribs in a GMG, I find if I want better ribs I'll use my Bradley, or charcoal burners.