I purchased a Smith Corona 1903a3. My question is; what is the best sling to get for the 1903a3? Cotton web sling or the leather sling that features hooks to make adjustments? I'm asking both from what was historically appropriate as well as what is the best sling for durability. I have avoided putting the leather sling on my Garand, as it looks difficult to make adjustments. Thanks for any information and insights you can provide.