Link to Spreadsheet for Calculations: https://docs.google.com/spreadsheets/d/1y3SeJTEiz-7Fl0OtwX2f2mrmSD6d6IRXl2CoSC-GsWc/
I created this mod in order to change what you refine out of each thing you mine. A 1:1 ratio of mass is returned. This also disables a yield module so that you can't gain more than 1:1 mass illogically.
In short, when you mine 1 kilogram of stone, you'll get 0.9 kilograms of gravel, 0.1 kilograms of other stuff.
Workshop URL: http://steamcommunity.com/sharedfiles/filedetails/?id=1340287817