Tony keeps a tight lid on that. I think he optimizes it for each flavor. It's part of the recipe to get the best experience from each liquid.
On waiting list for Caravela
oooh anyone remember using 4.8V batteries? sorry - just tripping down memory lane...
taps&dies http://www.amazon.com/7mm-High-Speed-Steel-Plug/dp/B0006FI7UY...
Alternatively there are a few engineering workshops that could do the thread for you OR even some with CNC mill's who could spit out a whole...
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