Scary Papa: A "blow-mold" skull is simply a hollow thin plastic skull... cheaper to make but not as detailed as your Buckys, Harveys, or Lindbergs, so they're sold in the seasonal Halloween sections at pharmacies, Walmarts, etc. (They're called "blow-mold" because they're made by inflating a hot plastic balloon in a mold.) Some of them have (cheaply) hinged jaws which are convenient when making the skull talk. I've noticed most seem to be smaller than life-size, which can be an issue shoving all the mechanicals in if you're trying to do a traditional 3-axis.
As has been said before, the Bucky skulls are durable but HEAVY, so I used a Lindberg for my 3-axis. Really like the look of the Harvey (especially the teeth!) but a little brown gel wood stain on your Lindberg goes a long way.
Lightweight plastic skulls are easier for servos to push around, and heavier skulls usually look better. The Lindbergs are highly recommended because they hit the sweet spot. For what it's worth, making a 3-axis for me was a pretty rewarding experience that taught me a lot, and worked better than I feared it might.
Quick, unconfirmed Google comparison:
Bucky: 3lbs, ~$15US
Lindberg: 1.8lbs, ~$16US
Harvey: 2lbs, ~$40US
Blowmold: <1lb, <$5US
As has been said before, the Bucky skulls are durable but HEAVY, so I used a Lindberg for my 3-axis. Really like the look of the Harvey (especially the teeth!) but a little brown gel wood stain on your Lindberg goes a long way.
Lightweight plastic skulls are easier for servos to push around, and heavier skulls usually look better. The Lindbergs are highly recommended because they hit the sweet spot. For what it's worth, making a 3-axis for me was a pretty rewarding experience that taught me a lot, and worked better than I feared it might.
Quick, unconfirmed Google comparison:
Bucky: 3lbs, ~$15US
Lindberg: 1.8lbs, ~$16US
Harvey: 2lbs, ~$40US
Blowmold: <1lb, <$5US
