Pretty solid now - say 90% of the time. I first had them installed like this below. Basically the opposite of how you want them so taking the advice of Wakemakers I rolled them 180 so the pump outlet is on top and they work good now.



My only challenge in getting them to work 100% of the time is that the bags are too big for my compartments (still haven't ordered the custom ones yet) and they will bunch up and cause problems on occasion.