I have not been able to find Arrowroot flour, nor potasium bicarbonate.
So no alternative baking powder.
I have been doing sourdough. Buckwheat flour 50/50 with water,
and a dash of maple syrup as a starter.
Then the last version was; Starter, then Rye four, with raisins,
Goji berrys, sunflower seeds, and millet and flaxseed soaked overnight,
then more or less ground in a Moulinex and added with it's water.
Kept adding rye flour till it seemed to be a good consistency.
It makes a heavy loaf, but got good response on it.
One person said: "Hey, where did your find real food? ..."
Some pieces were not left for mates to try,
the first taster ate it all.
So I keep trying every other day and see how it improves.
Looks like no suggestions from this forum so far.
So I report, and bump it.