I’m loose mtl. I usually skip kit tanks and use one of my usuals. I just looked at the tank, dt is NOT changeable. You unscrew it to access the inside, and it’s sloped so you can’t add a 510 to it. While it’s 810 at the top, it’s fairly small bore at the bottom. I can run a tank of juice through one if you want. .8 isn’t out of mtl range, if the af can get tight enough.
Edit... just filled a little and tried it with the af closed. Not mtl. I think I could use it, but it feels definitely dl only to me. Even barely open, it’s a good amount of air. Flavor is good, especially for a stock coil. I’ll save this one for my son in law.
Thanks for doing the test run for me! I’ll pass on it for now and keep looking. It’s surprising to me that there are almost no tiny kits with mtl tanks.