Benro MAD 38C Adventure Monopod Strap Plate

My friend lost his strap plate that goes under the top plate the ball head attaches to. I have a nice shoulder strap attached to mine and he wanted the same. He could not order one or find one online so I took mine off, got all the measurements and made one for him. My step-son helped me with the 3D app to create it. My friend is going to be very happy! My printer made the inner hole a tad too small even though it is exactly 20mm. If your printer does the same, a small round file can easily ream