Connect body part for humanoid vampire lord

[hellu321]

Hello! I have recently rig a vampire lord from using vanilla skeleton (of vampire lord) to a human skeleton (to use humanoid animation) using blender (latest version) and now the mesh have 4 problem :

 

1.I can't align the body part correctly ,i have try to export mesh with location data, export with scaling data but when i get in to ck is just won't align with the body mainly with head, hand and feet mesh and i also create BSDismemberSkinInstance.

 

2.The mesh keep breaking when turn on animation as i google and had found out that the problem was manifold so i apply it then the problem with that single mesh gone away now it only on those independent mesh like hand, head and feet there always the gap between the connection so the how can i connect these body part like those human body part.

 

3.Even applying manifold is still only fix the hand, body feet (one layer) mesh only when i apply it on the head mesh the internal part of the mouth is always stretch out (maybe weight, vertex or something).

 

4.And the last is i want to rig the armor of the vanilla vampire lord to the human when i import into ck it appear in armor addon but when wear it on the vampire lord it just disappear along with the vampire body.

 

Thanks for reading.