Lazy_Tiger
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Depends on your equipment, if you grinder is able to spit out clump free and fluffy grinds evenly across the portafilter, i would say using a distributor can help prepare the grounds for tamping easily. However if your grinder spit out clumpy grinds and unevenly across the basket, using a OCD will not help in anyway. You would still need to use a toothpick to break up the clumps and distribute them evenly. The OCD only distributes on the surface and it certainly does not help with the clumps.
Plus one. Socratic coffee did a test. Using OCD leads to lower extraction rates. OCD also did not reduce the variability of the extraction rate (consistency)
http://socraticcoffee.com/2016/12/examining-the-impact-of-the-ocd-on-total-dissolved-solids-extraction/
Assuming a more even puck leads to high extraction rates and better taste then using an ocd may not lead to a more even puck and better taste.

