How to best mimic popular indexes on Portfolio Visualizer?

I'm trying to backtest some popular indexes on Portfolio Visualizer. I currently have:

• FTSE All-World: 57% US Stock Market + 43% Global ex-US Stock Market
• S&P 500: 100% US Large Cap
• MSCI World: 67% US Large Cap + 33% Global ex-US Stock Market

Link to my current setup

It's probably not very accurate for various reasons:

• I'm using Global ex-US Stock Market for All-World and World. That can't be correct because World doesn't include EM.
• MSCI World should contain US Large and Medium Cap, but I'm currently only using US Large Cap. I'm not sure what are the right percentages for each.

How can I improve my setup?

​