Disappointed! - XS Sight Systems Lever Scout Mount

I purchased the scope mount hoping that it would fit as a drop on component. It did not fit! The forward pillar mounting hole was cut too far forward and prevented correct alignment with the dovetail mounting pillar. I had read another customers review and he was able to use a file and remove enough material to ensure proper fitment on the rifle. I tried that and now I have a very expensive piece of scrap aluminum!
I intend to contact XS Sight Systems to see if they have a configuration management difference between their products and Marlin. If I can get a mount that fits, I'll purchase another.
Federal Express did not deliver as advertised either. Their website stated that the package would be delivered on a Friday and it did not arrive until the following Monday. I live in Southern California where porch pirates are stealing us blind and knowing when a package will arrive helps prevent that. Thank you!