If you have the old Laserox Dwaren Mine insert, you can develop it with the Dwarven Mine - Forgotten Folk expansion. Only compatible with the old Laserox Dwaren Mine insert, it is unnecessary if you buy the current version of Dwarven Mine.
Supports the following
Laserox Dwarven Mine insert
The full Forgotten Folk expansion can be store in the base box, with a 1cm lift lid.