Improved Hip & Waist joints for Mad Cat MKII

When printing/assmbling the Mad Cat MKII BattleMech (http://www.thingiverse.com/thing:44025), I found that the hip and waist joints were far too weak (at least for me) -- the tabs would break off just cleaning up the part (if not while removing it from the print bed), let alone trying to actually use it to connect the Mech's parts..

So, I set out to design stronger joints, and this is what I came up with. These will not break, period!

In each case the "snap in" part is replaced by two halv