As you might surmise, Suguino improved on the Campy tool, which likes to wander out of its position. The Suguino version has a small prong that locates the tool better, by sticking into the hole between the slots. Duh. They just might have committed the remarkably rare act of watching users try to do the task before going to market?
Ah, Campy! love to hate 'em. Some of the best and some of the worst designs ever.
harvey sachs mcLean va +++++++++++++++++++++++
Dear 'com,
There is a Campy "special tool" that holds the rear side of the bolt steady while you torque the Allen wrench. It's not expensive. Also using it is another coordination challenge, IMHO.
Ken Freeman