Hey Glen,
Can you put up a chart of the Presidents and Chancellors and their times in office, party, and major initiatives? I usually find that's easier to see who's doing what when when it's in a chart format. I grabbed these from your timeline, but I may have missed some information, or misread dates, so I wanted to check with you to verify this is how your timeline goes.
I think I have them all here:
Presidents:
Friedrich Ebert 1918-1933
Paul von Lettow-Vorbeck 1933-1947
Otto Braun 1947-1955 (died in office)
Konrad Adenauer 1955-1962
Ludwig Erhard 1962-1976
Herbert Ernst Karl Frahm 1976-
Gerry Bernstein 2011-
Chancellors:
-Gustav Bauer 1920-1923
-Gustav Streseman - 1923-1928 (died in office)
-Hermann Müller 1928-1930
-Heinrich Brüning 1930-1933
-Carl Friedrich Goerdeler (DNVP) 1933-1940
-Konrad Adenauer (Zentrum) 1940-1947
-Erich Ollenhauer (SPD) 1947-
Elections held in 1918, 1920, 1923, 1933, 1940, 1947, 1954, 1969, 1976, 2011 (from mentions in the timeline, I may have missed some)