I got a shoulder strap with my EXCALIBUR and do not know how to attach it, help... I also have a small piece of black plastic that came with my unit as well, do not know what it is. It is 2 1/2 inches long and 3/4 of an inch wide. It has two holes 1 3/4 inches apart. I did go out detecting yesterday for the first time. I was impressed. I found 1 clad penny, nickel, screww cap and a mercury dime. I still need alot of practice. Boy, silver sure is darkened by years in the water. Would be nice if it stayed shiney like in the ground, would aid in the recovery effort. Thank you.