1, Stay Put special alignment features (Illustrator 10.03 used)
a, complex path to Mongolia or group based on alignment of an object, it can be complex path, mask or a group aligned to any target object specified benchmark.
As shown below, there are A and B composite path, there are C and D the shear component version, there are E, F, G group consisting of a single path H.

now to Mask of D based on group selection tool used to choose D, Palette Stay Put in the mid-point mark, while D object as a benchmark.

group selection tool to choose to use B, F, H:

Stay Puty transfer click Align Center button on the board, then B, F, H to D based on Align Center, and other objects are not mobile.