Magoo wrote:Blind tasting protocol pls: another_jim or davec?
For cupping, just google "coffee cupping."
For espresso, you need to do some gearing up. First you need two identical baskets. Second, you need to get used to using the basket separately from the PF (think of the basket like a nespresso pod, and the machine plus PF as a unit). Two ways to do this. First, remove the spring clip from the PF, which is easy, but inconvenient for knocking out the puck. The second is weakening the spring clip by bending out the angles, sot hat the basket pops in and out easily. This is more work, but also more convenient. Having the basket on its own makes shot prep much easier, especially with the Niche, where you can use the catch cup as a cocktail shaker. Once you're set, you'll be able to grind and prep multiple baskets, have them lined up by the machine, and churn out shots.
To do grinder comparisons, set the girnders so the same dose produces the same shot weight on the same time. Do this for a fine/low dose and a coarser/high does grind setting. Mark one basket discretely under the lip with a marker pen. Prep both baskets and shuffle until you no longer know which is which. Do the comparisons.
Don't worry about which one tastes "better;" better is a four letter word when tasting analytically. Your job is to do enough comparing until you can tell the grinders apart consistently. There are two possibilities. One is that you don't succeed. Then the grinders' quality is identical. The other is that you do succeed. Then there are also two possibilities: you like one better because ..., or its a wash, because ...
For instance, after doing enough testing I could tell the Niche consistently from the K10, since the Niche is softer tasting. This is a wash because I can get softer tasting shots from the K10 by grinding finer, or edgier shots from the Niche by grinding coarser. For the Niche and the Vario with brew burr at French Press grind, the brew burr Vario is cleaner when the cup cools off, but I can't tell them apart very consistently, so for the time being it's a wash/win (?) for the Vario. As you can see, grinder testing is tedious, hard work.