Thanks all for thoughts and advice. I did a swatch of duplicate stitches and its a great idea for the odd stitch but I think I’ve got too many singles to only duplicate those making it a bit uneven and, as Creations predicted, if I do the whole W as duplicates it becomes too raised. Excellent reminder that duplicates are an option tho, I hardly ever use them and I probably should / could.
The videos from OffJumpJack are super helpful but I’m sort of trying to avoid having too many floats because I fear the baby might pull at them or get teeny finger caught. But I didn’t know how to catch floats before so that was really helpful for future projects. Thank you.
So, I think the intarsia option that Creation suggests is the way to go using a couple of smaller bobbins to work the middle bit of the W.
This will be my first multi bobbin attempt, having only worked with three before on a more blocky intarsia project so I can forsee a tangle of bobbins in my very near future 

If I ever finish this I’ll post a pic of the final result - front and back 
