If you need to run servo wires in a wing without the string leading the way here is a trick. Cut off a single flute of coroplast, trim it very clean. Run a long piece of soft copper grounding wire in the flute, leaving about an inch of the coro hanging off the front. Bend it in to feed thru the first and if possible the second rib, then slide the coro off the wire thru the ribs. Once you have the coro reaching the exit hole feed a piece of fishing line back down thru the coro. After the line is thru, carefully pull the coro out with the fishing line remaining. The coro wont cut your covering as easily as a piece of wire and also tracks itself better than using the weight on a string method.

Happy builds!

I use fishing line with a small weight on the end. Seems to find its way thru the holes pretty easy.
Edwin

or you can use a piece of lightweight string and suck it through with a vacuum cleaner or shop vac. works very well!

A beaded chain (type you find in the plumbing dept) works great. If there's a hole, just wiggle the wing, and the chain will find it and drop through.

Ed's trick works best for me.

string and weight (washer) work for me. As well as taping a sting in there as I build teh wing! sometimes a paper tube put through teh ribs too!! After few times, you learn!

Yeah, I prefer the paper tube during the build myself. But sometimes you end up with a second or third hand plane where the last guy wasn't thinking about the next. I didn't like the sinker and line method but will try the chain in the future.
I was only sharing a trick that has worked well for me in the past.[sm=thumbup.gif]