TexasCHLforum.com

If I am not mistaken you can send your sig back to them for a around $50 and they will recondition it, install night sights (If it doesn't already have them), and when you get your gun back it will be in like new condition mechanically with no worries about things like wear.

EDIT: Just looked it up. Its actually $130, they replace worn springs, detail strip and inspect everything, install sights, lube and reassemble the gun, and return it in a factory case if you didn't already have a good one.