I was wondering about the airy draw too. I've had a KR8 manual battery for a month or so. I've been using the adapter to M201 atty and it's a great combination. After seeing the new carto filling method, I decided to give the cartos a try but I can't get them to screw on to the battery all the way. After trying (and not loosely either), the holes are very much exposed and makes for an airy draw. I really have to force the turn to cover the holes. I mean, I can get my adapter on tightly with no force. What's up with the cartos, is this normal? I just don't want to mess up the battery.