I use mainly the Brigham (or Brebbia) tool. The small scoop works well for moving tobacco from the sides of the bowl to the cherry in the center . Also, they're inexpensive and I'm sure I've lost dozens of them over the years. I'm rather particular about reaming, though, and I never use a knife. For a quick reaming I use a Castleford reaming tool, and for more careful reaming I use the Senior pipe reamer. The only thing my pipe knife has ever been used for is cutting plug tobacco.