Using the TOR-SE77 square edge tool holder immediately increased the accuracy and speed of my tool finishing. They are worth the price paid, but you need to take your time and practice for cheap reasons to become proficient. Setting up the BGM100 takes some time and thought, hence the 4 stars. First try: I installed mine exactly as directed, but it was too close to the stone (I kept tapping my fingers on the Delta grinder's quick-release hub) and not well placed. The second time around I took…