Yes, it is the Chopper from Hilmar Lange. I downloaded the plans and tried my luck in building with Depron.
Albeit it produced a nice flyer I did not continue to buil Depron aircraft for long as I found it not as satisfying to work with as wood.
Plans can be downloaded here:
https://www.flugmodell-magazin.de/downloads/trainer-und-feierabend-modell-chopper/
