To plan for my base I use the crafting speeds from the crafting menu, however these are obviously impacted by the crafting speeds of assemblers. The calculator has no way to change that and I have to use green assemblers. That's totally fine, but I wish I could get a "normalized" output that assumes my crafting speed is 1.0 rather than 0.75 (I use blue assemblers a lot).

I was tinkering with the mod and came up with this:
https://www.reddit.com/r/factorio/comments/176paro/maxratecalculator_idea_normalize_crafting_speed/

From the looks of this discussion thread it looks like the mod isn't under maintenance anymore. Would the author accept PR contributions?