Ingame Measurment

Hey Guys,
i read many posts regarding BP that measures between 2 vectors and so on…
I’m trying to create a “Measure BP” that spawn my first render target via the motion controller trigger where my line trace hits (e.g a point on the wall/floor) and then creating a second render target sothe widget can calculate the distance between them. i’m having some troubles making it work…any ideas?

hope i was clear,thx in advance

What did you implement so far? Which part isn’t working?