Sounds like the club needs more "affordances" to help the user. Maybe a sticker with ↑up↑ and ↓down↓ printed on it, in such a way that the text is upside down

Sounds like the club needs more "affordances" to help the user. Maybe a sticker with ↑up↑ and ↓down↓ printed on it, in such a way that the text is upside down if the club is locked incorrectly.