A quick test of shaking vs WDT on espresso extraction, inspired by Lance Hedrick's videos. I do not find any statistical difference in extraction between shaking or WDT for distribution. I do think it's easier to pull off consistently, however.

The dosing cup I use (not an affiliate link) is a CBSC: https://www.amazon.com/Dosing-Stainle...

I'm using a homemade WDT tool, Ascaso Dream PID machine, Eureka Mignon Crono with espresso burrs, 19g dose with ~45g output, IMS basket, extraction measured with an R2 Extract.

Original LH video:    • THIS CHANGES EVERYTHING... (Wdt, Auto...  
His followup:    • BEST WAY TO PREP ESPRESSO?: The Final...  

My previous big WDT test:    • WDT, Extraction, and Flow  

=== Timestamps ===
00:00 Introduction
00:37 Some comments on technique
04:10 Test Parameters
05:40 WDT Results
06:12 Shake Results
06:30 Extraction Variability
06:58 Shot time
07:12 Statistical Test
08:20 Post-test Conclusions