lklawson
Grandmaster
Forward Grip, Edge up/in was, if not common, fairly well known and even popular with some Bowie Knife users. Apparently it was particularly popular in the South during the Civil War period where we see some example appearing of Bowie Knives with the knuckle bow oriented to the spine of the blade instead of the edge. This would be the FGEU and was apparently intended to facilitate a thrust to the body/center-line with a rip up and out.Although FGEU may seem odd at first, it is a simple and effective way to utilise a knife. Not common in Bowie knife work, the "mountain man" grip takes advantage of natural body mechanics to slice and rip.
Not sure how much actual USE this got in real fighting but it does show that the concept was fairly well known.
Peace favor your sword,
Kirk