[radiohenry]

Ron,
 Thanks .065 " is good to know. I was headed toward the fishing line next but didn't know how thick to go.
I would like to suggest a much better way to make the loop.  
Tie a Palomar knot. It is a fishing knot. Simple and stays tied. I have used it for years. 
  Take a length of line and pinch it between thumb and forefinger. Pull out say 6" then bring the end back to form a loop . ( pinching that end between thumb and forefinger) 
   This gives you a 3'' loop 
   While still pinching wrap the loop around your fore and middle finger.
   Take the loop end and bring it thru the wrap around your fingers and slowly pull it tight by holding the the new small loop and pulling your fingers out that wrap is the knot you are tightening.
     Tough to describe but practice some and you learn how to adjust the length of the loop. 
    Google it and you should get a simple picture. This knot will not fail and untie when tied tightly
                                            Henry.