Still downloading random grids from the net? Why not create your own and fill it with values that work for your project. Set up your body copy properties together with preferred microblock ratios and calculate them into a system. Choose between multiple columns and gutter options to match your styling preferences and export your grid as Sketch or Photoshop file.
Because, why you should fit an elephant into the fridge? Nobody needs that. Instead, build a custom-made jungle that will fit your elephant with a breeze. Then spice it up with some other animals of your very taste.
For a detailed view on the process behind Concordia algorithm development, implementation and a topic of grid calculations take a look at detailed project case study. Also, don't be greedy, share this page with your fellow designers.