4.8 set master pose / set morph targets are "unsafe" in construction script

After getting the 4.8 release I am getting blueprint warnings that setting master pose - or morph targets in the construction script is unsafe.

Where am I meant to set them ??

I would like to know the answer to this as well. My player character is modular so I can switch pieces of armor. I was using Set Master Pose Component in the construction script to bind the head, arms, hands, feet skeletal meshes to the body mesh. How am I supposed to go about doing this now besides using on event begin play? On event begin play works for in game but ruins using the view port in the editor, which makes it a pain testing animations, armor combinations, etc in the editor to make sure they look good and fit right.