* Delete 1 Part 3749 Light Gray Technic, Axle 1L with Pin without Friction Ridges (Extra)
* Change {3 to 4} Part Light Gray 3749 Technic, Axle 1L with Pin without Friction Ridges
Comments from Submitter:
All 4 are used in the alternate model. See instructions page 28+29 steps 10+11.