You probably already have your answers above - either do basically nothing or just go with your differing speaker wire lengths. And if you feel you need someone with a little more background to weigh in with their approach... well, every decade or so I wind up answering something with the link below. I'd always thought that Roger Russell seemed pretty knowledgeable and did have some level of experience and success in this industry and once I'd read his comments I stopped worrying and obsessing about lots of this and started listening more and focusing on stuff like finding more great source material.
http://www.roger-russell.com/wire/wire.htm
http://www.roger-russell.com/wire/wire.htm