Startup Equity Division - How to cut the founders pie

In a previous post I promised to share a spreadsheet which helps calculate startup equity division.
There are two sheets. "Cutting the Founders Pie" provides overall instructions as well as an overview of:
  1. the core component weights
  2. the relative contribution of each founder to those components
  3. the weighted score
  4. the % of equity allocated based on founder contribution
To use in an editable form select File->Download As...then export to .odt/xls, etc.
Please post any questions, suggestions for improvement in the comments. Comments are moderated so it may take a short while for them to appear.