If using a weapon foci power 2, and your base skill in katanas is 6, and you're ambidextrous 6, when wielding the weapon foci katana and another katana, would you be throwing 12 dice (8 + 1/2 of or 11 (6 + 1/2 of 6 + 2)? IE, does the weapon foci add to the base skill?
Other question, do you have to sleep with your weapon foci, shower with it, crap with it, eat with it, etc, just so that it doesn't deactivate?