I've tried two different OBS T-VCT's, being sure to close off air flow when I refill, with brand new o-rings, priming them first, and am still experiencing leaking. I haven't even tried the TC mode yet and am not necessarily interested. I have had some people swear the Uwell crown doesn't leak, but just read through some comments and reviews on YouTube and see some people claiming their crown leaks and/or they are going through coils like crazy. I have also heard the Uwell crown is meant for lower wattage devices. The T-VCT, coil wise, I love; I don't go through a lot of coils what so ever, (only about 1 per month!) and don't plan on learning to build anytime soon. The leaking isn't awful or costing me alot; it is only around 1 ML every day or two. It's just annoying and inconvenient. Is there a happy medium, where I will see next to no leaking and will still experience the coil longevity that I do in the T-VCT?