Thank you, mike !
I wonder that it was so heavy ...
When I looked closer, I discovered that the rudder and the dorsalfin completely filled with epoxy in the field of their leading edge.
I removed these lead-heavy parts and replaced them with balsa !
savings: 116 grams !!!
All 6 30 gr. Servos were replaced with 20 gr servos
The torsion bars for the ailerons were removed, instead linkage in the wing panels
cheers
Martin