Just replaced my 2006 22’ cruiser fuel, vent, and fill lines this week. Panels were bolted at the top and had screws at the bottom into a metal bracket. If the panels covering the tanks are bulging out, that seems like serious tank deformation or maybe even blocked vents in hot weather? I have 25 gallon moeller tanks, and after replacing all the lines and scrubbing tanks and the cockpit under them I still have a bit of fuel smell. According to Moeller these particular poly tanks do allow some fuel smell to permeate… not too happy with that as I want to sleep back there under the full canvas, but it is apparently not a level of ignitable vapor. One day maybe I will replace the tanks, but that day was not this week. I dont know if other cbrats have experienced this, but I have seen it talked about on other boating forums with similar references to manufacturers saying it is “normal” to smell fuel from some tanks. If you can get pictures up, it would help us understand what is keeping your tanks jammed on!