Reverse engineering Janome embroidery cards

I recently went down a bit of a rabbit hole trying to reverse engineer the embroidery cards for a 1990s Janome Memory Craft 8000 sewing machine I bought.

I’m hoping to be able to write my own designs to a card, but haven’t got that far yet. As it’s rather a long write up, and still a work in progress I’ve put the write up on a separate page.