Does anyone know what the Wedge flex shaft in a sm5 54 is? I changed Iron from 710 KBS tours shafts to ap2 714 DGs300 and my SM5 54 has the same KBS shaft the old Iron did. It feels a little to stiff now that I'm playing the DGs300's, I'm considering re shafting the wedge. but not sure what shaft to put in it. I also 58 with the stock Vokey wedge flex and it feels fine..