I like the custom Alhambra outriggers. Could you put your outriggers on a hinge and tip them up when paddling? or is that when you need them most.
Hinging the outriggers would add complexity and a multitude of other problems. The outriggers cause very little drag with a reasonably loaded kayak. I paddled all over Upper Blue Lake with these and found the kayak nimble, fast, and oh-so stable. It is only when overloading it with a diver and gear that it gets sluggish.