NH 644 core tension spring

Watching the rainy days pile up and my mind has wandered to this spring. Is it a wear item? Mine has been bottomed out since buying the baler with 12,000 bales through it. It around 16k now and I’ve never thought it made the tightest core. (It’s a NH, I realize, not the absolute hardest core on the market) I finally looked up the price today and it’s far more reasonable than I expected. Is replacing it at 16,000 bales a reasonable expectation or even if not common, a good idea?

NH 644 core tension spring