Quote Originally Posted by Maverick View Post
I needed to run wires down the the spars for the strobe and wing tip lights. Given all the obstructions in the spars, I went to Home Depot and bought some drip irrigation tubing, 1 inch, I think. Anyway, it was easy to run the length of the spars and created a clear path for the wiring. Once the wiring was where it needed to be, I pulled the tubing back out leaving the wires in place. I didn't use this tubing in the fuselage because only the trim wire is routed back to the tail so it didn't seem like it was needed but, I could see how it would have worked well for far less than PEX both in cost and weight. In my first KF5, I used a piece of 1/2in PVC for the fuselage but, that plane had the battery in the tail along with other things and that worked fine to.
Probably not a huge issue, but pulling the tubing out means that the wiring is free to rub on the internals of the wing or other structure.