That's ridiculous! For the record, if you're using appropriate screws for MDF, you can re-use the same holes for 2-5 replacements if you don't over torque them. After that, you can slide up to a #10 screw (vs #8) and still use the same hole. For those who had some driver rubbing issues, that can happen on occasion, but I suspect many of the problems came about after they scrapped my packing design as it cost them too much. Of course the experts down in Colombia thought they could come up with something much cheaper, and did so without even asking me if it would work. The higher cost was because they didn't have access to the preferred materials so we got there with a little extra labor and assembly. They ended up using much too rigid a polystyrene, which ended up only offering puncture protection while making for very high impact on the cabinet and the stamped frame supporting the magnet/metal of the woofer. Mind you they had no issues with damaged subs with my packing design, whereas they had many issues with all packing efforts after that, with plenty not being covered by UPS.
Seaton Sound, Inc. firstname.lastname@example.org 773-290-8436