Challenge 29 can be solved using the successful setup from #28, but altering the direction of the top ‘gear’ at the start. (Violet gear placed as in instructions for 28, red gear immediately below, violet gear to its left. Two green dumps, one dumping right, placed to the red gears immediate right, one, dumping left immediately below the red gear.) Top ‘Gear’ pointed right (dumping the blue ball to the left) gives all blue balls. Top ‘Gear’ pointed left gives one blue, one red, then the rest blue.
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