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Here's a pic of "two contenders" for optional use in Herbie:
S & B dosing capsule in the bottom chamber and miniVAP Flexicone module patiently waiting it's turn to provide vaping pleasure
For me, the clear winner is the miniVAP Flexicone as it does not get as hot, it is much easier to load and unload, it stays shut (my dosing capsules seemed to sometimes be difficult to get open and sometimes they came open at the most inopportune times). For me, the Flexicones vastly improved by Herbie experience so no degradation. I can do microdoses very easily. The Herbie bottom chamber stays clean almost forever. The Herbie top chamber/screen (that seemed to need a lot of cleaning) never needs cleaning as that part is not used.
I can easily add a tiny degummed hemp filter to the Flexicone so all that micro ABV dust stays out of my mouth and water bubblers---the reclaim is 10X cleaner than stock Herbie reclaim. Bubbler reclaim is like pure honey instead of loaded with micro ABV particles.
Here's what Flexicone looks like, in pieces:
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Herbie with Flexicone plus
@Ratchett Herbie SONG (silicone adapter) is great with hydratube, with a hose connecting to bubbler, with a long glass mouthpiece direct on SONG, or just with a hose as Song provides a much more secure hose attachment than stock Herbie.
Once I experimented and found the Flexicone option, I never use the stock Herbie bowl. Note that I never was a fan of the stock Herbie bowl, I always thought there had to be a better setup.