depends on how clean of a hole you cut. mine i stenciled out a perfectly round circle, and put weatherstrip style trim around the edge of the jagged metal so you can reach your hand into the trunk through the first aid kit latch without cutting your arm. costs like $.99 at a hardware store, and takes less than 10 seconds to install
the hole itself is not very visable from inside the trunk, so i honestly wouldn't worry about it. are you planning to upgrade the rear deck speakers for imagine? most people simply opted to remove those speaers rather than cut the hole like we did..