Even the world's best ball strikers are constantly looking for an edge in practice, and that certainly looks to be the case with Rory McIlroy ahead of this week's BMW PGA Championship at Wentworth.
Rory was spotted using a couple of very interesting training aids during a practice session on Tuesday, which has led to much speculation as to what the devices are, and what the World Number 3 is working on in his golf swing.
