Received 50 ft of Vans conduit for electrical wiring. Unfortunately, they don't list the diameter show I couldn't prepare the holes, or get the right tools. I've seen lots of websites that reject the conduit and do other methods, but it seems to be cheap and adequate for the task.
I acquirred a new unibit in 1/16" increments, up to 7/8th". The conduit is 1/16th less than the maximum. That's important to know because it means that I couldn't run the unibit straight through the ribs on successively longer extensions. The max of 7/8th" leaves the hole too large and a perfect fit. This was a QB wing so it wasn't an option to drill the out during assembly. And with the wing skins installed on most of the ribs, it leaves limited access.
The outboard end ribs were drilled, but the inboard will require a new solution to reach with the unibit.
Instead of using RTV to glue the conduit in place, I fabricated a simple 'horse-shoe' clip with a nutplate/screw to secure it. The nutplate goes on the clip to simplify fab. The clip is 1/16th smaller than the holes but fits the corrugated conduit's small section.
