• Are you tired yet?

• Remaining "Dolebusters." The project is long dead.
  These few have managed to live through the migration process.
  However, most have reported that they "could not tell the difference" between ones that survived and ones that were damaged.
• Evidently, they were never polished enough to be mass produced.
  Their use was very niche back then, and nearly obsolete now.
• More information can be found here.