Without going into to the detail of said article. I also think the ABV calculation is wrong. I did a simple test in the receipe calculator: Batch size 10 liter 1.985kg dextrose (1.907kg for Alternate ABV calculation) custom attenuation @ 100% results in a calculated ABV of exactly 10.0% results...

thanks guys, your prompt responses is most appreciated. So, while I'm typing this it's boiling away quite nicely. My main concern was starches. However, I got that sussed: I measured pre-boil OG, did temperature corrections, re-measured the exact size of the pot, more high-school maths...

Hi I'm a first time all grain brewer and noticed this fine floury trub at the bottom of my wort after sparge. Is that protein or starches? Grain bill: 0.8 kg Gladfield light pilsner malt 0.8 kg Gladfield wheat malt 0.25 kg Gladfield Toffee 0.25 kg Gladfield Rye 0.25 kg Rolled Oats (and yes, my...