I use safety wire on ALL connections other than Festo. It is a pain to do the airlines, but after many memories of chasing leaks in Rhom-Air equipped pattern airplanes 20 years ago, I think that it is worth it! The solution to this pain was a tool that I developed. I took a "cheap" screwdriver like the ones that are used for promotional purposes and drilled a hole in the tip. I found a piece of brass tubing that would fit over the end when it was smashed into an oval shape. I then re-smashed the tubing into a round shape along it's length except for the last 1/2 inch or so. This way, the tubing is locked on the screwdriver. The brass tubing holds the wire in place while it is twisted. This tool makes the safety wire thing easy to do and it is easy to get into tight places.

The pictures show how to use it.

Tailwinds,

John