Also, if it was modeled after the SPD, and the success of the revolution ultimately laid in German workers' hands, why are we even looking to the Bolsheviks, shouldn't the SPD (pre WWI) be of more value to us?
That's the comradely and strategic point that many posters here are having difficulties accepting.
Anyway, as a note for you, Ostrinski, and others: the "Bolshevism" of the first four Congresses of the Comintern is organizationally irrelevant to workers today, even when Lenin tries to stress parts of the SPD model (because it's now in a corrupted form). Even Old Bolshevism is organizationally irrelevant to proletarian demographic majorities. There's only one institutional model viable enough to adapt to modern circumstances.
"A new centrist project does not have to repeat these mistakes. Nobody in this topic is advocating a carbon copy of the Second International (which again was only partly centrist)." (Tjis, class-struggle anarchist)
"A centrist strategy is based on patience, and building a movement or party or party-movement through deploying various instruments, which I think should include: workplace organising, housing struggles [...] and social services [...] and a range of other activities such as sports and culture. These are recruitment and retention tools that allow for a platform for political education." (Tim Cornelis, left-communist)