New Suggestions:
1. If at the time of Hindenburg's death Otto Braun is president, but we have an event where he asks the party to resign due to personal circumstances. We can refuse (then everything is as usual), or agree - and then there will be an event for the presidential elections of 1934
2. Make it harder to persuade the Center Party and the National Liberals to support the candidacy of a socialist in the presidential elections of 1932. If in 1934 this was still theoretically imaginable within the framework of the "anti-Nazi front", then with Hindenburg alive this was extremely unlikely in real history. Otherwise, I propose that in the elections of 1932 and 1934 there will be a fine if we forced the Center Party and/or the liberals to vote for our Social Democratic candidate. For example, that a third of their voters will not vote for us. Otherwise, the mechanism of incomplete conversion of party votes only when we support the candidate of the Communist Party.
3. I propose to make a similar vote loss, when we support some candidate who is not ours in elections. I supported Adenauer's candidacy - then the left wing (some 2-3 percent maybe) must vote for Telmann, and not for Adenauer. In the 1924 presidential elections, Gustav Noske supported Hindenburg in the second round, although the SPD supported Wilhelm Marx. So this is historically accurate.
4. Not to combine all the votes of "other" parties to the DNVP in the 1934 elections. This is not entirely correct - it is worth giving them at least half and/or two thirds, but the rest - to the candidacy of the liberals or Adenauer. Still, all these microscopic parties were very different. I don't think that they would all become part of a united far-right bloc.
5. If the march on Berlin takes place under President Otto Braun, then one option could be to hold early presidential elections and/or his resignation with Hindenburg returning as acting president in the name of "national unity." For example, that with the reformed courts they took a neutral position, began negotiations - and the Nazis, in order not to look like the instigators of the Civil War, are ready under pressure to make a temporary compromise in the form of Otto Braun's resignation and snap elections to the Reichstag. Besides, if the SA and the DNVP paramilitary were banned, they will be legalized as part of this compromise