This is basically a duplicate of my earlier posting on the "Maintenance and Troubleshooting" Board. I've had my Custom Carry for about 7 months and have run about 5000 rounds through it (all factory, no +P). Recently, while cleaning it, I noticed what appears to be a perfectly straight, vertical cut or crack on the right side of the breechface (viewed from the front of the slide). A TRS owner who responded says his has two such cuts, and they haven't caused him any problems. I'm thinking there must be other LB owners who have experienced this. Any comments? Thanks.