by another_jim on Wed Jan 04, 2012 2:14 pm
Finer grinds work more consistently in all machines; but especially entry level ones. The double basket that comes with the machine is designed for doses around 14 grams, where you would use the right grind level. If you want to use higher doses in this basket, you would need coarser grinds, and you shot consistency would nose dive. The Strada and VST 18 gram baskets use the same grind at 18 grams you would use at 14 with your regular basket, and thereby allow more consistent up dosed shots.
The gotcha on the VST baskets is that they require more precise dosing than other baskets, and you would be well advised to weigh doses on a tenth gram scale, at least until you could get within 0.2 grams of target by feel. I don't know the baskets John mentions, but if they take high doses at fine grinds like the VST and are as charitable to dose variations as regular baskets, they would be an improvement.
All in all, starting out, I would strongly advise getting good shots using 14 gram doses in the stock double basket, i.e making the espresso for which the machine is designed. First, this is a lot easier than making good espresso using parameters for which the machine is not designed. Second, there is no way you can even know at this stage if the result with the VST, even if used properly, would be preferable to you or not.