@mikes3dlife: Rory McIlroy and Nelly Korda both use this golf training aid… but does it actually work? 👀⛳️ I put it to the test. SMASH or TRASH? 💥🗑️ What score would you give it out of 10? 👇 #GolfTips #RoryMcIlroy #NellyKorda #GolfSwing #GolfTraining