Resting on them is this pattern http://janeeborall.freeservers.com/MotifFerrisWheel.pdf and of course I have used the version with a button in the middle. As you have gathered it is Jane's pattern.
Jane is actually helping me write out a pattern at the moment for a design of my own. I have been working on it for weeks and weeks and nearly given up many times as it is so very complicated. It is going to be a very unique pattern based on something which is very well known, especially in our family. I don't think anyone has ever attempted to make one in tatting before. I am so looking forward to it being finished!