I currently have milled grind 3s 52 56 60 and wanting to switch to SM9s same setup. MG3s have a Tour Issue S200 shaft. MG4s have a Tour Issue Wedge 115. I like the threes because they felt light in the. I've swung the new 4s and they feel relatively lighter while swinging them as well. SM9s on the other hand, were a lot heavier during the swing which I'm not a fan of. Want to order but trying to figure out best route to make sure I can match the swing lightness of the MG4s...