It's been four years, and I'm astonished the original WDT has held up so well. I have a lot more experience with espresso now, but I have not seen any significant improvements on the dissecting needle and yogurt cup funnel. My current grinders (dosered Robur and ghetto-modded doserless Major) do not require any declumping, but I still use the WDT to a) contain the grinds; b) fine-tune the dose; and c) ensure an even distribution.
If I were to make any changes to the original article, I would probably focus on dose. Looking at the pics, I was obviously updosing a lot more than I do today. Stirring the grounds in the filter basket after removing the funnel ("fluffing" the grinds), and then relevelling, allows you to reduce the dose without screwing up the distribution.
Kudos to Orphan Espresso for marketing a more aesthetically pleasing version of the funnel. For the price, though, you'd think they could toss in a dissecting needle or two.
