Hello guys/gals I'm sorry to say but I have given up on my Griffin 25. I tried to like it I really did, and I know I might get some hate from some people but I have to share "my" experience with this rta. First It's a beautiful tank, solid, no machine flaws. Grub screws were spot on no stripping cross threading etc. O-rings are excellent, had no leaks that were not fault of wicking "user error". Drip tip no wobbles keeps things cool even under high heat builds. Sits flush on my RX200S. But I tried many different builds, single and dual twisted 28 gauge. 26 gauge, 24 guage, Geekvape fused Clapton, spaced, non-spaced,parallel, 3.00mm ID 2.50mm ID. I just can't get the flavor I want from it, I believe it may be just more built for "clouds bro clouds", because clouds you get. but the flavor just isn't there "for me". So I'm going back to my Wotofo Serpent and Uwell Crown. Again this could be user error I'm not arrogant enough to think another vapor isn't capable to get a flavorful vape from this tank, but sadly I could not.