I've considered buying capsules, but decided to get powder instead because it's cheaper and allows more flexibility if I change dosage or decide to pre-mix stuff. I couldn't sell the capsules I make because I don't measure them precisely enough (they vary by +/-10% or so). I currently take 5 capsules day - two of piracetam, two of choline citrate, and one of sulbutiamine.

Putting together capsules sounds hard, but it's actually quite easy. You get empty gel caps, which come as two unequally sized pieces that fit together tightly enough to stay in place but loosely enough to pull apart. Take the pieces of the capsule apart, pack some powder into the larger piece, put them together, and drop it on a scale. If it's within acceptable range, drop it in the 'done' container, otherwise open it back up and add some or remove some. After a dozen or so, you get the hang of it and can hit a 10% tolerance pretty consistently on the first time. Wear latex gloves so the gel caps won't stick to your fingers and you don't get hair and sweat in the powder tub.

(Edit: the discrepancy between my saying a month's worth of capsules in 30 minutes, and a rate of 10/minute, is due to setup and cleanup time; and neither of these numbers was precise to more than a factor of 2.)