I would recommend that after replacing the front ball cup to use a long tie wrap or long hose clamp to keep the ball cup on the ball. I had always poo-pooed the notion that I needed either one after seeing how tight the ball cup fit, but.....
It will certainly remove itself from the ball and always at the worst possible time. Mine happened when I was selling the Jalapeno (80 EuroS 5 speed). Guy buying it jumped in the car for a test drive. He backed into the street and the ball cup popped off. Darn it!! Embarrassed, I told him I would secure it for his drive the next day.
