It was also quite hard to get the consistency of the dough. I made it three days ago but it was too wet so I left it to dry out a bit. Looking at recipes on the internet it seems that there is little leeway for error in the proportions and I don't have terribly accurate scales or a measuring jug.
The corn flour was rather expensive, I got it in Sainsburys, but I imagine that it shouldn't be too hard to find a cheaper source, probably from Indian or Chinese supermarkets. It's only fine corn flour.
I'm not quite sure what to do with the tortillas. I guess if they were cut into triangles and fried in corn oil then we'd have tortilla chips. An alternative is to fry them whole and then drizzle with honey and cinnamon and serve with vanilla ice cream. It's a dessert I've had before.