I got some comments related to disabled machines. They all never see the config option so I should reply "Change config". It's like spam. Also, I got the way to collect bedrock. The answer is to use Bedrock Module, but there are 3 entries you must change in config to use the module.

• If the machine is disabled, not just telling "This is disabled." but "Change config"
• Remove duplicated config entry, "remove bedrock". Just enabling bedrock module will allow you to remove bedrock.
  • Add more comment in "Collect Bedrock", which tells how to collect bedrock.