Notice how the Transparency Slider even when on Zero still doesn't give you a real transparent in OBS. Follow these steps to create a Color Key to Fix that!

Go to your OBS - Sources Window
1) Click on + to Add a New Source
2) Choose "Window Capture" (name it Feedback Overlay) Click OK
3) Make sure bHaptics Overlay Window is Running on your Desktop
4) Slider is on ZERO %

Now we want to Add a Color Filter to this Window Source
1) Click on "Filters"

2) Click on + or Add then Choose "Color Key" rename or just Click OK
3) Change Key Color Type to " Custom Color"
4) "Select color" key as your HTML: #000000

Well Done! Now you have a true transparent background for your OBS! - Enjoy