We have one that we used alot a few years back. It really worked great and I wish we still used it even once in a while. I forget the make of it but it was black. LOL that helps dont it.
Anyways they require a bit of time and you need to watch them and the temp quite a bit.(as im sure you know) But the end result is well worth the effort. The smoker we have has two vents, one of top and one on the side to control draft. It works very well to control temps. Also there is a gage on the top and side.
Yeah I think its time to break it out again for the summer.