I ride an '84 Peugeot PH10 (bought it new in '85) with the Maillard Helicomatic rear end. Still have the tool that came with it. Still ride the original Rigida rims and Maillard hubs, the spokes were replaced about 30 years ago when I relaced the wheels. Anyway, 30 plus years and I've never had a problem with the Helicomatic set up.
Jon