Which geocacher completely rebuilt the electronics of this cache in 2015?
The answer : Hexamine
The Schatz des Alberich geocache (GC2J9J5) is the continuation of Alberich der Zwergenkönig, in the same Riedrode forest. It ranks among the most rewarded caches on the planet.
The owner's instructions say a great deal about the mechanism: you must not turn the ghost over, nor drop it into its cave — or it will lose its voice — and above all never try to unscrew anything yourself. If you get stuck, the answer is in the hint.
The cache was adopted by KleineTruppe in February 2015, at the request of die Helden, and its electronics entirely rebuilt by Hexamine on that occasion. An impressive feat of construction and maintenance that can only command admiration.
The answer : Hexamine