I just got my 16mm FD a couple of days ago, and so far I’ve only tried with VTC-6s. I don’t know how much different batteries change performance, but here’s how I feel about it so far:
Someone who wants huge clouds and super fast extraction from the first heat cycle may want a smaller coil, but I already find flower in a Ti tip easily overheated for my taste (some overcooked taste at least if I heat past the first click, done in 3 heart cycles) and I get a lot more visible vapor on the first heat cycle than I did with a torch. I may consider lowering the coil a little or just pulling the VC right at or before the first.
Performance with the Dynacoil in a Ti tip has been great though. Not choking clouds (although I’m sure I could get them by holding past the click), but a good and manageable amount of vapor.
That makes me think I shouldn’t make changes, but I might try adjusting the coil eventually or switching to lower powered batteries if that actually makes is noticeably less aggressive.
I think most people would probably be pretty happy with mine the way it is with VTC-6s though, and I’m sure I can learn to get the results I want with flower even if I don’t change anything.
I think I need to experiment a little more experience with it to get used to it, but so far I’m happy and impressed with the FD! It gives easy, consistent results and has made me use my VCs more in a day than I ever have before. Hopefully that didn’t make this post too disjointed.