I gotta say I'm enjoying this atty more and more. I haven't had any more issues with the barrel coming unscrewed when putting the atty on a mod and I'm enjoying the flavor. It's not better than my Tugboat V2 with SC but its' still pretty darn good. I haven't tried removing the o-ring yet like Mr.Mann did but like cheesestain I have had some leaking. There's no real discernible cause for it either. I brought it to work with me the other night and dripped a bit shortly after getting there. I noticed some leaking, cleaned the bottom of the atty and top of the mod and then put it back on. Didn't leak for the rest of the night and I've no idea why I did at first and didn't later on. I think I'll take off the o-ring later and try it that way for the next couple of days while I'm off.