I personally don't know very many people that use plenums. I have, however, discovered that this is a debateable topic (such as DSBs). You will find opinions on why you should and shouldn't use one. I plan on a DSB
in my 120 because the research I have done and I'm most comfortable with one. IMO
, you should do what YOU feel comfortable doing and it seems like you are researching all about plenums and that is good. Let us know what you decide. Hopefully, you will get a response from someone using a plenum.