I would look at the card, figure out the first cube needed, describe it in my head (e.g. "white triangle, apex in top right corner"), place cube, and then go back to the card to figure out the second cube, etc all the way through. No real sense of the overall design
Yes, this is exactly how I did it. I instinctively recognized it as the type of compensatory strategy I've been using all my life. I wasn't all that slow at it, but I knew it was not really how I was "supposed to" do it. I do a lot of things this way--describe it in my head verbally.