TG, thanks for the link (and the links within the link and the links within the links within the link
). The information provided pretty much explains a good bit about the pros/cons of plenums.
The only thing I question is my use of substrate size on top of the plenum. I did not carfeully plan this out and therefore, I think the function of plenum is hindered a bit. I will try to take a picture of my DSB just to show you how deep it really is with the plenum (another con, you lose a lot of vertical space).
It is like everything else in this hobby. I know people who swear by them and I know people who would rather go the DSB route (or other routes). THere is always more than one way to skin a cat.
FWIW, I think all of the GARF tanks are run with a plenum, just another example of success with this setup...
Here is a very long thread where the subject was debated ad nauseum on RAG. With the links provided you should have enough reading to last a LOOOONG while...
Take er easy
Scott T.