Thank you both so much for posting your impressions
@Pib and
@buford !!! I've keeping quiet and waiting for on the ground reports, and I'm really happy to see that my experience with these stems is shared. That's the best part, to share something wonderful and fun.
The cooling domes offer some draw resistance (similar to the standard stem), but you can customize them (use less domes) to your liking and even put glass balls or similar between them.
Great callout on being able to use different internals captured by a dome on each end. I (obviously) love to tinker and mod and making the cooling system accept off the shelf variables was purposeful. User maintainability and tunability is a huge plus in any device or accessory that allows it. Even within the 8mm dome idea, there are domes out there with more holes (for airflow), different materials (titanium instead of 304), etc.
All of my FlipDome stems using the same core dimensions for the cooling components was also purposeful. The idea is that if you buy one of my stems and I/users come up with something better in the future, you'll be able to purchase or recreate what that is, across the board. This puts a lot of size constraint on the TM2 stems, but it comes with numerous benefits like allowing for deeper heatsinks while maintaining overbuilt structural integrity, and a larger thermal battery in the midsection to manage overall stem temps.
I imagine the cooling is great. How is the airflow restriction. Is there a big trade off?
Compared to a third party TM glass stem for example. I don't think the stock CU should be compared to as it's terrible and no one in their right kind uses it.
I hold my designs to such a cruel standard and sometimes forget that the stock components on many devices ship out with things I'd never accept. Many times that's why I'm making an accessory in the first place.
"Better than stock" is a good baseline, regardless. At the high temps I love using the TM2 with, the stock CU wasn't enjoyable. I only have the stock stem and the torpedo stem to compare with, and agree that the FlipDome is closer to the stock CU on draw restriction. Obviously, screen cleanliness and stem pack has a huge effect on restriction in use.