I have the Mutation X V1 & V3, Mutation XL V3 (26650) and a Troll V1.5 in copper. Out of these two, I prefer the Mutations over the Troll. Although the Troll isn't a bad RDA, the Mutations are more versatile.
i bought an aluminum heat sink for mine mainly to keep heat off the batt, but it cools down quick just pull air through it with out firing the coils a couple seconds, its good again. mine will cool quick cuz i took the afc out. believe it or not it works better for massive vaping mine rarely gets too hot unless im doing back to back vaping like a show off cloud chase but i got mine to quit smoking so i rarely hit it back to back like a cloud chaser. i took my afc out for more air flow because the coils inside produces such thick vapor. so when it comes to cooling it its no prob at all because of all that air flow i have. all that air coming in keeps the cap cool AF during vaping on mine but you also have to have the coils, wicking,and power to make enough vapor to compensate the extra air intake so your hits arent airy. but yeah once i got good at coil making and i got a box mod that afc had to come out cuz the way i got it now i can burst out a 12 foot long and super massive plumb of vapor from a 2 second draw(istick clock) gets good flavor too using my 2.7mm claptons. i love the derringer i even bought 2 more i like it so much but yeah it can get hot. what i love too is it doesnt spit back into your mouth like a lot of other rda's ( especially chuck stlyes). i got this little rda figured out. this rda is what made me realize theres a lot more to rebuilding than just slappin stuff together and throwing juice in it lol hope this helps! when i get on my tablet ill put up a configuration pic of mine if you'd like.
i wanna get bigger coils but im running about the biggest i can fit atm
