I used a very similar set up from occidental for 5 years before hanging it up for service work. While my set definitely shows it's use, it does not show one sign of damage. 5 years, 8 hours a day, not a stitch or rivet has popped.

I will strongly encourage that you invest in a set of suspenders. It's important that you balance the weight of your tools on the right with the weight of your material on the left. Otherwise, you'll constantly have tweaked hips which will result in lower back pain. Similarly, suspenders will lift all of the weight of your hips and place it on your shoulders, again preventing lower back pain.

Finally, just because you have room for 15 tools in your bag, that doesn't mean you have to fill that space. If your not using a tool that day, put it in your bag. Every ounce you avoid carrying is wear your not putting on your spine and knees. A conduit reamer may not weigh much, but carrying it 2000 days in a row may very well make a difference in your long term health.