Success!! - She held together and the glue has set and she works! The 'Wonder Wheel' is born.
This is Harley Quinn taking her first ride without the need for human intervention. The cog and ratchet mechanism are functioning properly and holding the pod in position. I've got to say that I am very happy. My expression is truly 'Jokerlike' :-)
The key change has been the use of cocktail stick dowels at the base to secure the ratchet mechanism in place. It can now operate in tension and therefore secure the cog even with the metal model adding significant weight to the outer limbs.
Now I do seem to recall an episode of Batman, back in the day, when the Joker flew over Gotham City dropping chemical bombs on to the population. Naughty Joker. I believe he did this from a very colourful balloon. I wonder if he stole it from the Fun Park? .......