Hi, Assuming my readings and calculations are correct, I routinely get super strong attenuation out of my Fermentis dry yeasts (S-04 mainly, T-58 did it too), to the tune of 95% AA. I do think the hydrometer's functional. As for attenuation/ABV, I plugged formulas into an Excel sheet (not that the AA calculation is that complicated)... I use extract with no more than 10% steepies, can that explain why it always goes way beyond the advertised 75% AA? Or is it just normal and the lab is giving a very conservative attenuation estimate? Not that I'm complaining about using less malt for my ABVs, but it does get me curious.