I've been fiddling with that blackknight helmet and the mech torso for a while, it finally came together.
The mudflap piece creates an amazing seal along the front of the mech torso. Also giving you hidden room for control detail.
I stole the hand design and I find it very stable.
Oops I left one the collars up a bit. Yeah that random knight will just have to do for now.
Used the rounded click hinge for the collars.