Starbucks and Trader Joe's? OK, I've bought Starbucks beans and had them grind them to my specs for the Aeropress when I was visiting in NYC. It was not that bad. They still can roast better than I can but they don't have anything approaching varietal coffees. I used to buy only Trader Joe's Dark Sumatra. But now that I have discovered roasting, I have never looked back.

For the Aeropress, I use one rounded scoop of unground beans for one cup. I grind them to between espresso and French press. I steep for one minute, using the plunger to keep the coffee in the tube. I even did an Instructable Make Great Coffee with an Alternative to the Aeropress 'Inversion' Method and a video about it An Alternative to the Aeropress 'Inversion' Method. There are tons of videos on the inversion method so naturally, I got some flack and down-votes from that crowd but who cares? They are exactly the ones I was talking about above. Infantile little fanboys who think their clumsy over-thought method is best.

My wife uses a Vietnamese filter coffee strainer with my roasted beans.

Don't worry, if/when I do the SCR mod I will make an Instructable on it. I have not seen that done anywhere.