I've built a wall-e (set number 21303). This is the corrected version - and I've found, in addition to the 'obvious' spares, like 1x1 flats and round antennae, I have a 4x4 dark grey (4243831) left over. I can't work out where it goes
Image taken from google images, but its the same part
The only place where I can find one in the instructions in in step 65/page 54, and the parts count in instructions confirm there are two. The set's built and I don't notice any cosmetic or structural deficiencies in the design, but its bothering me
I've checked through the instruction manual a few times, focusing on the main body (since the arms, and head is paired parts, and there's no space on the neck for a 4x4)
What am I missing?