'Set Master Pose Component' warped animation


I am using the Modular Private Military Pack from the UE4 marketplace and trying to set it up with the master pose component.

When I play in editor the animations (Mainly the hands) are all out of alignment. But in the previews they are fine.

Any help would be awesome!

So this is how I had it set out in construction script.

The mesh originally had the head asset in it but I have now switched it with the shirt asset and it drives the rest.

For some reason this has stopped the animations shifting/warping when I play