Seen it posted on one of the threads, i think they were called "ice angel anchors" looked like a pretty good idea. Just drill a hole a foot down or so and drop one of these into it.
Another guy posted that he makes his own from old skil saw blades, once you see the original, it would not be very hard to make your own.
I'm sure someone that knows more on these will be posting soon
Here.....Hold my drink & watch this