I have a modular character with separated parts (for game) and different head variations. For some reason one head has differently weighted edge loop around neck, which causes problems when moving neck bone: ![enter image description here][1]

Both heads have vertices in the same place along this problematic edge loop and both are separated from torso. If Head nr 1 deforms correctly, then, after transfering weights, Head nr 2 should deform the same way, right? When i Transfer Weights from Head 1 to Head 2 it transfers the weights (i've tested it), but this problematic edge loop is still detaching when moving neck bone. How to solve this problem? Here's my .blend file ('Head2' mesh is hidden): http://www.pasteall.org/blend/35974 [1]: https://i.sstatic.net/FXzOQ.jpg

I have a modular character with separated parts (for game) and different head variations. For some reason one head has differently weighted edge loop around neck, which causes problems when moving neck bone:

Both heads have vertices in the same place along this problematic edge loop and both are separated from torso. If Head nr 1 deforms correctly, then, after transfering weights, Head nr 2 should deform the same way, right? When i Transfer Weights from Head 1 to Head 2 it transfers the weights (i've tested it), but this problematic edge loop is still detaching when moving neck bone. How to solve this problem? Here's my .blend file ('Head2' mesh is hidden): http://www.pasteall.org/blend/35974