Good morning folks. I've been reading for awhile now and thought I'd go ahead and join. I just purchased a 17-vl and have a question. I'm totally new to this whole thing but I plan to be a long time wood stove user. I'm about to install a 17. Haven't completely decided on double wall or single wall yet for indoors. I'll be installing duravent pipe .Do I need an adapter at the stove? At the support box? I think I'm going with the telescoping stovepipe into a square support box. Any info would be appreciated. Thanks