First post here, first time roasting. I did a search and found a
> usenet post by a guy roasting for 3 years having lousey results. I
> won't last that long. I promise! I've tried twice with Colombian
> Supremo beans, and yuk! Sour!? I buy pre-roasted Millstone Colombian
> Supremo beans from Sam's Club. 2 lbs. for just under $12. I like this
> stuff. Then my wife buys me this Z&D roaster, it's my B-day. It came
> with some green CS beans. My first roast was for 26 min (the outside,
> medium roast time for this roaster). The taste was awful, sour papery.
> I'm following all the rules. This morn I reduced the time to 23 min,
> then instead of the cool down sequence, I immediately removed the
> beans, placed them in a metal collander and left them over the central
> AC vent for a few minutes (see Sweet Maria's website). I grind very
> fine. Works well with the pre-roasted Millstone beans. The taste is
> still sour. The dry taste on the tongue is good, but the wet taste is
> sour? I like bitter. I hate sour! The beans look fine. The 26 mi beans
> are dark brown, the 23 min beans are medium brown. I had my buddy try
> the brew and he couldn't drink it. He agreed with my "sour"
> description. He's a Millstone CS drinker as well? Any hints, clues,
> flames, slights, criticisms, chuckles, offers to take this thing off
> my hands? What to tell my wife?
Try using fewer beans; this should speed up roasting time, which might fix the sourness.