Screw did not fit receiver - Sniper Tactical Saddle Scope Sight Weaver/Picatinny Rail Mounts For Remington 870

The mount itself seems fine, now that it is finally mounted. Before I purchased it I called customer service to check to see that this would fit my Remington 870 Express. I was guaranteed that it would fit. Well, the front screw that was provided was too big for the hole in the receiver. So, I had to ream the front hole in the receiver in order to get the front screw mounted. Not a huge project, I guess, but it was frustrating that I had to mess around with this. I saw other reviews warning of this, but I was just hoping that I would have been one of the lucky ones that was going to have an easy go at installation. The mount seems to be pretty nice, just be prepared to have an issue with installation.