Thanks Kenny,
I did find the post and it answered my questions. I'm going with the stack, I hate the smell and the kind of work I do I often have to be on the ground or arond the exhaust. I can even smell it when I use the 3PH log splitter. I'll tell you all something I noticed. I originally had a 2320 and you don't get the smell except at startup from cold. Somebody remarked about direct injection being a factor and noticing the 2320 doesn't have the severe problem, I don't know but I'm dead sure the 2320 didn't come anywhere near the smell of the 2720. On my 3320 I'm definately going with the stack and I'll talk to my nephew who bought my 2720 about setting up a way to put a stack on his machine too. Diesel is bad for you, I love these guys but I love my health too.