If only the manufacturer would make the bridge a permanent part of the cart ! That floating bridge concept needs to be abolished, any pressure from an atty that has a higher bridge than normal will push the plastic retaining ring into the cart. i do not enjoy fishing for a clear plastic o-ring while out and about. The idea is great, but seriously if anyone has any sway in how these are made, PLEASE suggest having the plastic bridge/stopper be ONE PIECE, that way you can push on the poly all you want and have it stay in place. I cant tell you how may times I`ve pushed the stopper into the tank and watched it float around until its empty.
IMO it would be a simple fix to a huge PITA.
There, I feel better now.
Neon