Hi John! To evolve your 5-star club into a 6-star club, you need five (5) pieces of a 5-star to us as your Catalyst. You can check our knowledge-base for more information about Evolving clubs: https://perfectswing.freshdesk.com/en/support/solutions/articles/47001110728-how-do-i-evolve-a-club-
John Smith
How do I evolve a 5***** pickle driver to a 6****** pickle driver?