Animation retargeting custom Skeleton on UE4 Skeleton problem

Support Animation and Rigging
1

Hi guys, I followed this video: https://www.youtube.com/watch?v=xy9aLbZLdeA

I imported a young Link mesh (in Blender with Metric 0.010 scale), made my own armature, that armature looks the same with the same names (same parents etc), but is just smaller than the UE4 Skeleton.
The retargeting ‘worked’, but some parts of my mesh freak out.

What did I do wrong? :frowning:

Here’s the link .blend file, and FBX I exported to UE4.
http://s000.tinyupload.com/download.php?file_id=34115354396125822455&t=3411535439612582245512128
or http://s000.tinyupload.com/index.php?file_id=34115354396125822455

http://imageshack.com/a/img923/7089/R2yoXH.png
R2yoXH.png1095×568

http://imageshack.com/a/img921/1052/AcCIW8.png
AcCIW8.png1920×1080

http://imageshack.com/a/img923/9388/R0qM78.png
R0qM78.png1920×1080

http://imageshack.com/a/img922/2158/EPkGuq.png
EPkGuq.png1920×1080