Quote Originally Posted by Surge of Battles
When the recipient of the surge makes a full attack, she may make an additional attack at her highest base attack bonus for each rank of this augmentation.
I'm pretty sure that means one attack per rank, not one attack per weapon per rank; but, of course, only Selinia can clear that for us. But nevertheless, I stand my point: Twinned Device's infusion effect should be redisigned...