I'm pretty sure that once you drill holes in the container, Lowes will not exchange it for a new one. Not to worry, as the Rev 3.8 design relocates the two bolts lower, where they will not torque the sidewalls causing the crack.
Just move the mounting bolts lower as per the dimensions here:
http://earthtainer.tomatofest.com/pd...tion-Guide.pdf
No need to patch nor worry about the old holes, as they are well above the water line.
Raybo