Pretty good for a first WWI model!
I only build in 1:72 scale, and I use monofilament fishing line of .13mm (.005") diameter and colour it with a silver permanent marker pen. Drill the holes and thread the line through, securing with a drop of superglue. If it is a little loose, heat an old knife blade and hold it close to the line, (don't touch it!) - this will tighten the line up.
Ian