As Clairey suggested, I really need to do my cushion in all different colours but I seem to lack the correct wool. I always think I have loads but somehow I never have exactly what I need. So I paused on the blue whilst I think about going back to a wool shop and instead tried it out with the really thin cotton yarn I have for the amigurimi stuff I've done in the past. I also tried out Rachel's interpretation of the instructions which differ to mine.
I'm so indecisive that I'll probably end up doing both a bit more to see if I like one better than the other. The cotton yarn is definitely harder as it's so tiny and has less stretch so you have to have your stitches just right so they're not to tight or too baggy. I think the woolier wool allows you to hide a multitude of sins so maybe I'll finish that one first.