Sharpening scrapers "up-side down", Dave (D-Way tools) and Jimmy Allen (Boxmaster Tools) are both big fans of sharpening scrappers upside down.
Besides conventional scrapers Dave has negative rake ones, largely due to Jimmy and another local (Scott) encouraging him
Jimmy's tools are (I think) exclusively NRS.
(for those not in the Seattle are, Jimmy is well known for his box work. Dave encouraged Jimmy to develop his own tools to do boxes with, so he did. The "plan" is for Dave and Jimmy to have adjoining booths at the Oregon Symposium)
Making sawdust mostly, sometimes I get something else, but that is more by accident then design.