Wow that was a fast update 
I have send you an email yesterday where i´m describing a very very specific problem. Can you maybe check your mail. I really wanna figure that one out to make the rig more suitbale for ALS.
Like i said, i´ve managed to make the rig fit the mannequin directly, but it creates a bug when triing to match pose from another character (retargeted to rigify via unreal). I wanna show you what i have done so you can implement it better into your system.