Finally got the v4 built today,and gotta say wow.I really like my v1's,but with the deeper channels in the newer versions,plus the ease of filling with the fill screw,then throw in great capacity with the bigger tank of this one,and it is a definite winner.I put the m-tank on it,and it looks just like an orchid again haha.I built this with 28 gauge kanthal and rayon,it came out to .7ohms and it throws out some very good flavor with thicker more dense clouds than any other attie i have,i am not a cloud chaser,but this thing is amazing,plus the added capacity to keep it going for a while,this is definitely a winner,and a 2nd one is in my very near future haha.