Just an update if anyone else ever have the same problems
I tested
cachaca 51headache central. Unaged cachaca. Tastes bitter, oily, with a hint of vomit. Mixer only.
bicardi white rumModerate head pressure. Not good enough
Cheap VodkaGlycerine. Headache
This means airstill is a no go :(
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https://en.wikipedia.org/wiki/PolmosAkwawit Polmos Spirytus Rektyfikowany 95 PercentThe best so far. Mild reaction. More hot though.
Wratislavia Spirytus Rektyfikowany 96 PercentModerate reaction. Smoother. Will not buy again.
Going from production below, excess/damaged sugar beet, wheat and/or potato is used. I wish I knew what above both used.
https://en.wikipedia.org/wiki/Agricultu ... ProductionPoland produced in 2018: 14.3 million tons of sugar beet (6th largest producer in the world), which serves to produce sugar and ethanol;
9.8 million tons of wheat (17th largest producer in the world);
7.4 million tons of potato (9th largest producer in the world);
4 million tons of triticale (largest producer in the world);
4 million tons of apple (3rd largest producer in the world, behind China and USA);
3.8 million tons of maize;
3 million tons of barley (14th largest producer in the world);
2.2 million tons of rapeseed (8th largest producer in the world);
2.1 million tons of rye (2nd largest producer in the world, just behind Germany);
1.1 million tons of oats (5th largest producer in the world);
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This means there is no option besides the usual spirit runs.
Using a pump or gravity to transfer liquids.
Sugar wash or mash may still give a reaction :( so buying reflux still is a risk. I don't have a source for sugar beets and carrots is too much effort.
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I'll update if I ever buy a still.