Not me, but a friend in the same marina, he had an AWB made by a company who started casting their own keels, out for a day sail and a snorkel, noticed that his keel bulb was missing, back into port and lifted ASAP! He walked round to his berth to pick up his gang plank and there it was at the...
They are banned on public transport in parts of Spain if not all, I suspect other countries will do the same, a few of them caught fire, lithium battery's apparently.