Olde-worlde Weight Clock - Revised

As part of the thingiverse MakerEd2 Challenge I decided to design a 3D printable clock.

I chose to design a clock which included a wide range of educational functions ranging from teaching children the time, to concepts of stored energy, inertia, gearing, leverage and many of the concepts in Newtonian physics.

As such this clock provides a visual and hands-on demonstration of a wide range of engineering and physics concepts that would be useful in the classroom.
The clock has been designed with ease of construction and cost in mind, as such specialized parts have been kept to a minimum, with the few specialized parts required being easily and cheaply obtainable.

https://youtu.be/G2eVQoxdh_k

I've revised the rear chassis and the escapement wheel shaft to make the clock much deeper and thus preventing the weights from hitting the back wall as they move. The two revised parts can be retrofitted to all of the original clock parts, so it is a very easy improvement to make. I