```ruby
class FormatCustomStandard < FormatStandard
  def format_pretty_name
    "Custom Standard"
  end

  def include_custom_sets?
    true
  end

  def rotation_schedule
    {
      "2016-12-08" => ["ayr", "dms", "ank"],
      "2017-04-21" => ["ayr", "dms", "ank", "ldo", "tsl"],
      "2017-08-06" => ["dms", "ank", "ldo", "tsl", "vln"],
      "2017-11-05" => ["dms", "ldo", "tsl", "vln", "jan"],
      "2018-01-21" => ["ldo", "tsl", "vln", "jan", "hlw"],
      "2018-04-15" => ["ldo", "vln", "jan", "hlw", "cc18"],
      "2018-10-25" => ["vln", "jan", "hlw", "cc18", "rak"],
      "2019-02-08" => ["jan", "hlw", "cc18", "rak", "eau"],
      "2019-05-29" => ["jan", "hlw", "cc18", "rak", "eau", "sou"]
    }
  end
end
```

Update Custom Standard format definition
user
```ruby
class FormatCustomStandard < FormatStandard
  def format_pretty_name
    "Custom Standard"
  end

  def include_custom_sets?
    true
  end

  def rotation_schedule
    {
      "2016-12-08" => ["ayr", "dms", "ank"],
      "2017-04-21" => ["ayr", "dms", "ank", "ldo", "tsl"],
      "2017-08-06" => ["dms", "ank", "ldo", "tsl", "vln"],
      "2017-11-05" => ["dms", "ldo", "tsl", "vln", "jan"],
      "2018-01-21" => ["ldo", "tsl", "vln", "jan", "hlw"],
      "2018-04-15" => ["ldo", "vln", "jan", "hlw", "cc18"],
      "2018-10-25" => ["vln", "jan", "hlw", "cc18", "rak"],
      "2019-02-08" => ["jan", "hlw", "cc18", "rak", "eau"],
      "2019-05-29" => ["jan", "hlw", "cc18", "rak", "eau", "sou"],
      "2019-08-26" => ["jan", "hlw", "cc18", "rak", "eau", "sou", "net"]
    }
  end
end
```
assistant