Haven't read this thread completely, but two thoughts
Our old club Lifeguard was destroyed because:
1. A silly tit* stood on the Ali floor and inflated the keel with a SCUBA cylinder until it blew up and caused him to soil himself.
2. Said tit then took us to sea (off Achill Island in the far west) without a keel and the poor sib "caterpillered" until the ali floor joints broke and the entire thing was fcuked.
Eventually she cleared a hedge when she came off tow and worried some sheep. The End.
My story, true.
* You know who you are