The 2012 BPS rods do not accept the balance kits. While the balance kits do add some additional weight to the rod, they make the heavier action rods more sensitive and comfortable to use. Only the 2011 and earlier BPS rods accept the balance kits. As I wrote in my previous reply, I love my G-Loomis rods, but I have absolutely no problem putting one down and picking up one of my Extreme rods (with the balance kit).