In part 7 of how to make a BB-8 I work on the head being heavier than I'd like, so much that it affects performance. I change the way the head support structure attaches so that I can lighten it, and then I hack away at it to make it lighter. I swap the 2000mAh battery for a lighter 150mAh one. And I replace the deodorant ball casters with much better, but still fairly lightweight, Pololu casters.

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Jonathan Rieke
Printable Science

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The Pololu casters used are these ones:
https://www.pololu.com/product/2691

See also:

Making BB-8 (v2) - Adding HC-05 Bluetooth RC - Part 6
   • Making BB-8 (v2) - Adding HC-05 Bluet...  

Ball Bearing Motor - How to Make/How it Works
   • Ball Bearing Motor - How to Make/How ...  

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