Interesting thought....
Larger diameter coils will definitely allow more juice into the coil, less dry hit. My vaping style, my personal experience (which may not be true across the board) is that I lose flavor with a larger diameter or spaced coil. I love a 2mm id coil, sometimes will try 3mm id if space allows, but never go over that...
I mostly go with 2.5 just due the the size limits of my current build decks. 3mm almost touches the inside of the cover on the bravo. My dead rabbit has a bit more space to go with 3 or 3.5 but thats just because of the top mount posts on it allow for this. Too big here and they would be sticking out of the driptip. Well, prob not really but ya get the idea.
Velocity styles are the only ones I could fit 4.2mm in and that looks to be about the limit with a clapton, maybe 4.5mm with regular wire. The reason for 4.2mm is TFV4 air holes but those are vertical. Velocity style are my only horizontal builds in use any more.
I don't have a loss of flavor. My squonker Velocity clone is for a watermelon flavor that's hard to taste in a tank. And my DIY is limited to 10% flavor.
I know the RDAs I did micro coils on way back probably would've been limited. Maybe I'll try one giant coil when my Themis shows up.
