And I found another celtic square by another brilliant designer! I may have to crochet just one and add it in to the whole as a surprise for Mr CTL.
What I was really looking for was a band that I could add in between the squares to add extra girth. I'm thinking I will need something for the sleeves so that they are not too tight.
The same designer who created this new square that I want to try may have my answer with her "Book of Kells - Celtic cable" (https://www.suviscrochet.com/)
I will let you know once I am further along with the coat.