For some reason I've never forgot the plug. Most likely just plain luck, but as I've heard a lot about how even clever folks miss it, I've done a little something to stay lucky:<br /><br />I drilled a hole through plug's square and fitted a shackle with the crosspin through the plug. The shackle is in the keyring with the key to the boat and to the trailer lock, so when checking for the key I'll notice the plug.