Well, my head was spinning after just a couple of pages. For posteritys sake, here is my summary of this thread. Feel free to correct me on anything I missed or got wrong and Ill edit the chart. The price and the throughput is from the Mfg websites.
While there was quite a bit of hypothesis on the diameter of the rollers, there was not much mentioned about the length. That would seem to clearly increase throughput.
I did not have a column for adding a drill or motor since that seemed pretty easy across the board (at least for the folks here
). Also, my general impression is that 3 rollers makes for a lot more resistance in cranking, but may provide a higher quality grind. In general, efficiencies and lauter speed seemed pretty comparable and probably has more to do with other factors from brewer to brewer.
Good shopping,
Jeremy