Thanks for a prompt - I've now added a note in the text to this effect!
That said, received wisdom is that loooong, slow ferments give more flavourful loaves. That's usually achieved with tiny amounts of yeast and time in the fridge. But please, go ask the experts over on /r/breadit, you'll get a much more reliable answer there.
Well, when sharing recipes, it certainly help if _we_ have a consistent way of measuring amounts. 1/12th teaspoon sounds very hard to actually measure in real life and some teaspoons have different sizes. Using grams (weight) or milliliters (volume) would make it much easier to replicate + it gets easier to multiply the recipe in your head.
So I agree, let's start using international measurements for recipes please!
Luckily, bread making isn't that exact, especially for home kitchens.
I'm not sure I'd say "few" but my frame of reference is Europe. Most people I know have a tool which seems to be called "measuring spoon set" in English, which has the common volume-measurements. People who do baking with recipes usually have a scale that can resolve down to 1g, which seems to work out for most recipes.
Good to hear that bread making is not that exact though, so you could probably eyeball it in that case.
(just wanted to add that with one weight you can usually [imprecisely] weight both really small values and really big values by multiplying/dividing. Let's say you need 0.5g but your scale can only do down to 1g, so you can weight 1g and then just half it and now you have 0.5g. Same goes if you need 1kg when max is 100g, just do 100g and then multiply)
Not with a 1gram-resolution scale - at best it's measured 1g +/- 0.5g, so after you halve it you have anything from 0.25g to 0.75g, +/- your own inaccuracy in halving such a small quantity. (I suppose you could count out each spore cluster!)
However, I really don't believe it's going to have a material affect on your homemade bread; that level of recipe precision just isn't important outside of commercial manufacturing.
I happen to have scales: The large volume scale was easy to find. The scale that would measure things like salt? not so easy to find and not cost effective at all.
I'm in Norway, by the way.