I have a Blackhawk Nightwing as a Christmas present. My tactical/combat knives days are long over, but apparently a friend still thinks that I need another combat knife. But hey, looking inside the mouth of a gift horse and all that... Anyway, I wanted to turn it into a dive knife just for giggles and grins. I figure it'd come in handy when it's time to annihilate sea urchins that have infested certain areas. The typical kydex sheath are not diveable, at least not if you want to retain your knife. I've been searching high and low on the intraweb but I can't find anybody that would make a kydex sheath to a design that would support scuba activities. If anybody know of a sheathmaker that would be willing to work with me on modifying his/her current designs for my needs, I'd appreciate the info.