Factory blends may not capture what goes on. Many brand names come out of workshops where a lot of the work is done by hand. It's not conveyor belts and huge mixing machines. Likewise, as pointed out, many pipe shop blends are simply purchased from larger companies and re-named to capture a customer base who may not know the sourcing of these blends. One of our former mods put together a great list of all of the names used by chains and shops to designate 1Q. There were about thirty of them, maybe more. Lanes, Peter Stokkebye, and other outfits that sell bulk provide many of the "house brands" sold by shops. A few large shops have their own lines -- Nat Sherman, Iwan Ries, and Cup O Joes come to mind, and smokingpipes.com has its' Low Country line of blends, and pipesandcigars has a dynamic program of creating new blends and reviving old ones, that is fascinating to track.