| Redesigned during production.
There are at least 2 different versions of instructions for this set. The differences for the second version are indicated in this inventory in the Alternate Items section with Match ID 99.
Quick overview of redesign: Replacement of a special worm screw (plus the 2-long and 3-long axles that hold it in place) with a standard worm screw, a 6-long axle, and two half-spacers. The special worm screw was only used in this set and in the 42026/42027 combo model.
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inventoried this Set on Jan 18, 2014