industrialforegoing-1.12.2-1.12.4-228
tesla-core-lib-1.12.2-1.0.15
Crashlog (If Any):

• Issue:
  Loot Crates from FTB quests can be transformed into each other using a Black Hole Controller from Industrial Foregoing, allowing players to transform any type of crate to any other crate at will.

• Is it Repeatable?:
  Yes, 100% consistent. If a loot crate of any type is stored in a Black Hole Controller, it is repeatable in two different ways (depending on if further crates are inserted manually or by piping items in):

Manually:
Unlock the controller and make sure the Black Hole Unit corresponding to the crate is empty (i.e. only the output slot has crates), any other type of loot crate can be inserted into the insertion slot above the unit.
If the stack in the output slot is (or becomes) partial, the newly inserted boxes will be added to that stack, converting them to the previously inserted type (see images below):

https://github.com/FTBTeam/FTB-Presents-Stoneblock-2/issues/109