(Above: Click to Enlarge, New Tab/Window will be opened.)
See this flickr set:-
http://www.flickr.com/photos/n00bs/sets/72157625199284037/
(Or, Full Slideshow Here.)
Well, from the second selected picture above, it can be seen that the metal mount of the K-5 is actually built on a plastic foundation. I just wonder why not made it metal? This is yet really something head-scratching, once again..