To complete this thread as promised, the Baby Backs turned out pretty good yesterday. I did a 3 hour cook at around 250 with no foil. Meat was tender, but not falling off the bone. No horrible petroleum flavor this time either. As a matter of fact, the smoke flavor was more mild than I'd have liked it, but considering that all I had was a handful of hickory chips, I'm not surprised at all. The smoke from those chips is not long lasting, and I've yet to get some decent hardwood chunks to cook with.
To address the question about the dampers, I cook with the exhaust wide open always, and the bottom slide vents as open or closed as necessary to keep a particular temperature. To keep it as low as 220, I've got pretty much everything but one 3/4 vent hole closed off (Each side with half a hole open) . 250 temps are held with 2 holes open (one on each side). I can get pretty hot temps with all 4 holes on each side wide open if wanted, and the Big Poppa has a second set of bolts to hold the basket up just below the cooking grate, so it can be used as a high temp grill, which I've not done yet.
For those not familiar with the Big Poppa Smoker kit, it installs by drilling 4 3/4" holes near the bottom edge on both sides, and you install a metal channel that has a flat sliding door inside it. The door allows you to cover or uncover as many holes as needed.
It's not as "air tight" as the pipe nipples and ball valved set ups on a regular UDS, as there are gaps between the channel and the drum, as well as between the sliding door and drum holes. So even fully closed, it would be hard to say that there is NO air getting inside the drum. With both sides fully closed and the exhaust closed, it will choke out a fire in time however, so it works just fine.
As to whether or not the fire was choked down too far, I have always had very light smoke, without any meat on the fire. Once the fat starts to render out, the smoke gets thicker.
Lastly, I forgot that my paint job was also the same colors as Dale's legendary no 3 car, but in all honesty, the paint job was modeled after the 1978 corvette pace car, which was also Black over Silver with a red pinstripe. Either way, I'm pretty happy with how it turned out.