Trigger, 12 ft booms will not double your range. In fact, it will not increase your range much, if at all. If you boat is under 30 feet it may prove to just put excess pressure on your fiberglass/ wood (or whereever the mast is mounted). It depends on what your running off them, bvut if you're running medium to heavy set ups of the boards, you should be fine with 7 ft. If you are running very light rigs, a few more feet will help get them down, but 12 ft above the water is quite high.