After a bit of deliberation I decided to go ahead & fit the wings with electrical conduit. Thinking forward: what if I need to add something within or to the tip of the wings? Well, it became obvious that plumbing the wings after the bottom skins were attached would be a huge pain. The left wing contains the pitot static lines, the magnetometer, wing tip strobe & landing light harnesses. The right wing routes only the roll servo & the wing tip strobe & landing light harness. My initial thought was to route only the left wing, however, since I had all the material in hand to do both wings - I did so.
I also added routing string through both wing's rib snap locks to aid in pulling through wire if needed. However, I felt the wings needed a bit more attention. I may not ever need to use the conduits but, for the low price of parts & time spent attaching it - it's a plus for me to have them in place.