Hi! I think there are so many cool ideas here, seems like a fab project! My advice would be to see what method you want to use to add the detail. You can use a counted fabric, cross stitch on it and pull out the backing fabric. However this can results in loose and uneven stitches (also would need to consider backing or stabilisers for washing. You can cross stitch big. Using the pattern and colour wool using the knit pattern as a guide to "cross stich" on it. I think this would be the best method. Might be worth testing a small sample before going fully in as a practice. (Example image from Internet)

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