I have a horn that is pretty thin - I can see through it with a good light. The front is smooth to the tip. I see that about 1.5-inches of tip is thick but after that it is translucent in strong light. Based on the thinness, I am afraid to put a groove to hold a strap. I can put a staple or a stud to hold something near the tip in the thick part. What are some ideas of how to attach the strap? The strap I have is a braided hemp cord with the individual strands loose after the tie, so getting it through a small "eye" is not a problem. Thanks!