I haven't checked if the column is true level... that's a good point. I have a roll of this folded in quarters and loosely wadded into the column.
I checked the heads and they were at about the same purity as the hearts. Read about 97 on the alcometer but the chart that came with it says to subtract 10 from that number at 80℉... but... now that you mention it... I went and checked the calculator on HD... maybe there's no problem after all...
hah... I may be losing it... or just can't read a chart.