I collected seven of these 3D wooden puzzles from four different manufacturers. Each brings a unique set of challenges that require patience and problem-solving skills. I'm amazed at the high level of design required to solve this puzzle, which required the pistons and connecting rods to be mounted around the crankshaft and in the cylinders so that they move with the rear wheels. For me, the problem here was between pages 35 and 51 of the 72-page assembly instructions. Gravity works against you during these stages of the assembly process. gravity repeatedly tries to pull the assembled rods/pistons out of the cylinders. I decided to turn the assembly upside down and let gravity do the work for me. Then the task. The instructions don't say anything wrong. I ended up working through pages 35 to 51 and the completed project was very helpful. If you enjoy solving problems, you will surely enjoy collecting this 3D puzzle.
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