What do you mean the adaptor is too small for adequate cooling? I don't understand?
This is the bubbler I had and it fits perfectly. Very tight air seal when paired up. It is the deal of the century at only $14. I bought it for another vape but it did not fit right. I have not tried it yet with herb in the Fury but I will this weekend. I typically (try to)only partake on the weekends. It is the IQ bubbler from PIU. Has a 10 mm joint. You could use it with or without water to cool the air. It is kinda big, but if a bubbler is too small it does not work as well. Fill with water and chill in the fridge - Come on Friday get here !!
DaVinci IQ - 10mm Water Filtration Mouthpiece
http://www.puffitup.com/DaVinci-IQ-H2O-Mouthpiece-p/qtqc.iq-bubb_10mm.htm
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I was messing around with this bubbler last night - not on the fury 2, but see how it worked - without hooking it to a vape. I have to put a hold on my recommendation because when I tried it was getting a drop or two or water out the bottom. It was not hooked to the fury but over a paper towel and with those drops coming out it could have wet the weed - not good. I admit I am a water tool noob so maybe I filled it too full or was to drawing to hard. I will mess around with it some more this weekend but just wanted to let everyone know. Probably me doing something wrong. Honestly I don't find the vapor that hot with the standard mouth piece - or I even if I don't put water in the bubbler, I could run it dry to cool the vapor if needed.