I've been scouring all the previous posts on venting the front bag in my '07 LSV on a stock gravity III system. I cannot seem to find a way to do it without replacing the bag with a new one with a third port. I added a new 1,000 lb bag in the port locker for surfing, and it has the third port, which wakemakers makes a vent line for. I'd like to do something similar with the ski locker bag as it gets really full of air when filling. Ideas for a homemade mod?