I went bonkers when I saw whom Stronghold was and I was hoping this would be an additional item to the TFCon 2011 exclusive.
Since it was not, I decided to make my own, and some people have hinted I should share it with others.
http://shpws.me/2Q0x
It will work on any other 5mm hand-hole toy, of course (and I think that's what the original Cerebros toy has, though I'm not sure).
I love Feedback! It's how I can improve!