https://www.titleist.com.sg/teamtitleist/team-titleist/f/golf-clubs/64830/shaft-extensions Does anyone know the inside butt end size for the AMC 2 R flex iron shaft? Lower back needs some help. Trying to get myself a bit more upright while I continue to try and stay ahead of “ Father Time”. Unfortunately I can see him closing fast! Thanksen-USTelligent Community 10https://www.titleist.com.sg/teamtitleist/thread/339730?ContentTypeID=1Mon, 05 Feb 2024 19:21:27 GMT9ab519fc-5311-4952-85cd-0a0ceffb73fb:0215022c-b738-4507-a766-88152f3bcc66Don OMore importantly, adding length will change the lie angle so you might end up having the toe hitting the turf deeper. Might want a shop capable of adjusting the lie angle work with you on both extenders and adjusting the club. Even better to work with a pro if something in your setup or swing can relieve some of your back discomfort.<div style="clear:both;"></div>