Using a physics constraint for camera lag

I have a child actor which is attached to my pawn and I want to use a physics constraint to simulate lag. The default spring arm lag is not showing the stretchiness which I require, so I figured that adding a physics constraint between the default scene root and my camera component could be the way to go. My setup is as follows:


Is there something wrong with my parameters? I’m not seeing the expected lag in the x axis that I require. Does the default scene root inherit the velocity of my pawn? Is using a physics constraint a valid method for this problem? Tips would be appreciated.