Hand embroidery - couching

After I couldn't find a picture of a two-eyed needle like my last post showed, I started to think - could I get good use from it with couching?  I found this page and could imagine using two threads - one thick and one thin in the two-eyed needle ...... I'm about to start and will post the result here soon.  I thought I would use this tree bark couching sample I made as inspiration.

Tree bark texture with hand couching yarns and threads

©Christine Linton