I call this mech the "Mächtig Jaeger," as it reminds me of a powerful Pacific Rim style "jaeger" mech.  The idea behind this one was to do a large format mech with dark blue ("Earth Blue" in official LEGO color parlance) and orange colors.  The challenge at this scale is to prevent it from collapsing under its own weight.  See my initial blog post on it.  I ended up completely rebuilding the feet after an initial test build proved too flimsy.  It stands well now and without support.  However, because a slight push can send it toppling over, I have built a support display stand that can sit behind it and help prevent it from falling over when displayed for long periods (and to hopefully guard against it pitching over off my display shelf in the next California earthquake!).