Well, I will be starting the build on my first UDS tomorrow. This has become such an addiction that I'm afraid that it will not stop with just one. I will take pics as I go and post them on here. One question. I know that I should not use galvanized parts inside this thing but is a galvanized smoke stack ok? The temps at the exaust end should not be hot enough to cause problems, right? Thanks in advance and thanks for such a great forum.