Animation retargeting custom Skeleton on UE4 Skeleton problem

Hi guys, I followed this video: Skeleton Assets: Anim Retargeting Different Skeletons | 03 | v4.8 Tutorial Series | Unreal Engine - YouTube

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.

Please help me to fix this, I’d get instantly addicted to UE4 once I understand how this works. :stuck_out_tongue:

Skeleton -> Show Advanced Options. Check your translation retargeting method and see if they are correctly set.

I haven’t looked at the attachments but have you checked that the Link mesh is properly skin weighted?