Review on Master the Art of Mechanical Construction with ROKR Building Construction Mechanical Pendulum by Frank Webster

Despite my best efforts including disassembling, lubricating and grinding the gears to increase/decrease friction depending on the situation, this clock does not work. The top gear (the "tic tock" part) either spins wildly out of gear, jumps occasionally and intermittently, or gets stuck completely. For reference, I've made dozens of these wooden puzzles over the past few months, including a hurdy-gurdy and a working projector. However, this is the only one that refuses to work at all. Very disappointed.