Updating scalar paramete for tank tracks

Hi im trying to make a RTS much like men of war and i am currently creating a tank for it ive got everything working apart from the tracks. I’ve tried following Epics video but that didnt help. This is a tank that can be selected and deselected and is moved to the clicked location with a move to node

This doesnt work
can anyone show me how i would drive the value for the Scalar parameter?

anyone???

I think you should put this inside BeginPlay or Tick (depending on your logic) instead of construction script. Construction script is executed when you place the instance while you are in the editor. I don’t think it will get called during gameplay.