Well, I've stood on them a few times accidentally (Richard cornering too fast or zooming off while I'm still sorting out ropes & fenders
) and they haven't broken yet (but don't sue me if they break when you do!!). We do get some water in the locker but not sure where from yet! Richard doesn't think it's through the hatch though. HTH.
Having said that, there is a certain person I know (not me or Richard B) who managed to break the hatch on said person's instructor's boat!!
Not sure what make of hatch it was, though.
P.S. I PMed you a week ago and apparently you haven't read it!!!