More info on Greve's plane: he told me it's a Schulze "Future 32.55" ESC, which handles up to 60A continuous. Price is a major issue with this ESC (300 EUR), but it is certainly better suited for larger outrunner type of motors, whereas the Hacker 77-3P is more suitable for geared brushless motors (it still works, but "backfires" sometimes). One nice thing about the Schulze is that the ESC is updateable upon returning it to the factory.

Greets,
-Fabrizio