Syncing Leap Motion coordinates

Is it a fool’s errand to try to perfectly sync Leap Motion position data to the Leap Motion Top image? Or for instance, say I was able to adhere the Leap Motion as close as possible to my head-mounted web camera.
When I open the Leap test software it has no problem accurately tracking my hands and placing a rendering over my hands, but when i’m in TD it is rather difficult getting a sense of what numbers to convert to image coordinates. I get numbers ranging from >800 to < -800. around the edges, although the x and y coordinates seems to change depending on the depth value (in my case the Y value).
I have not been able to find anything substantial on Ultra Leaps website and most examples on the web use leap as a table mount in a loose way.
Is it just meant to be for loose tracking, or can something more accurate be achieved?