Hi,
I am working on a tool that helps with rigging characters with Mannequin / Manny compatible skeleton in Blender.
One of my goals is to be able to rig any humanoid character regardless of proportions. That worked out quite well with the UE4 Mannequin but now I am having some trouble with Manny.
It works but the IK goals seem to overextend the leg during running and jumping. I’ll try to share a video below.
I admit that I am not very familiar with the IK system yet 
I’d highly appreciate any help!