Maybe it's time to invest in some Reyland spec CCTV at your sisters place Martin? Your set up is very good from the pics you put up a while back.
As for the folk who think its not worth keeping nice things, that's not the point, if you want something nice work hard for it, don't go out with the intention of stabbing someone if they won't give it to you.
Hope your sister isn't too traumatised by this martin, but on that note, will she be moving?