Hi NH, the lipped adze I spoke of is for cutting across the grain. I have three types the typical with the grain adze, a lipped adze, where just the sides are turned, these sever the end grain when cutting across the grain and a gutter adze you mentioned, a gouge of sorts. I use all of them for different stuff. I, for sure would not be using the lipped adze for trough or gutter work. Btw, never made a gutter with the gutter adze, yet.
