My PH told me to leave the sling at home. So I haven't even tried using one.
I used a sling for 2 days on my first Safari. Took it off on day 3 and have never used one again on Safari. It was always hanging on brush and limbs as bush was so thick I couldn’t keep on shoulder with out it hanging up. Also when carrying the swivels made that eeek eeek squeak noise. Will never use one again on Safari.