The exact drawings of the V-2 rocket, the production of the Tiger tank and Messerschmitt Bf 109 and others could be passed on via Maier's relationship with the Vienna city commander Heinrich "Rico" Stümpfl. Lieutenant General Stümpfl, former officer of the Austro-Hungarian Army and Austrian Army, knew about the activities of the resistance group and was always ready to help them comprehensively.
Maier could share detailed drawings of the V-2 rocket, Tiger tank, and Messerschmitt Bf 109 with others through his relationship with Vienna city commander Heinrich "Rico" Stümpfl. Lieutenant General Stümpfl, a former officer in both the Austro-Hungarian Army and Austrian Army, was aware of resistance activities and frequently provided assistance.