Charlie,

as you can see in the photo I used a laser light level to find the distance, but as you probably know the line gets somewhat thick the father you get from the source.  SO you can add or subtract a 16 th.  I got 4" 15/16.  Ed Klepis probably has that figure in his notebook.  Let me know what other numbers you come up with.

Bob Perkinson

RV-9  13B