The most natural way to set up these blocks is vertically centered over each other. At present, the only way I can think to align things is
1) mate faces
2) add a formula subtracting the length dimension of the two blocks and divide by 2.
Can I somehow reference the midpoint of edges or something instead?
Solved! Go to Solution.
See "Center-Plane" relationship. Also, if parts are symmetric about the global reference planes/coord-sys, you can show them and use the Mate/Align relationships to center them.