You want to do a search for Al's Gritty mix. You'll find lots of what you're looking for. A couple years ago I started using that mix. The link provided contains some pictures and some discussion about soil components.

Good luck

Al

Here is a link that might be useful: Scroll down for pictures

FWIW - 'drainage' and flow-through rates are two different things. Sand, including builder's or mason's sand, is too fine to afford good drainage and aeration, especially when compined with a fraction of peat, compost, and/or other small particles like topsoil or most bagged mixes, even in view of the fact that sand normally has a favorable flow-through rate.

The first three pics are the fast draining, well-aerated soil I grow all my houseplants in. The first two are made from Turface/crushed granite/fir bark, and the third pic shows Turface/granite/pine bark

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Here is another excellent soil for houseplants, veggies, and mixed containers, made with pine bark/peat/perlite in a 5:1:1 ratio (in the middle)
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For a discussion about houseplant soils on this forum, and to learn how to make your own soils click me

See the link below for even more detailed info, if you have interest.

Al

Here is a link that might be useful: For an even better understanding of soils ....