I love my k1000's...I have 2 and only really use them now over my SVD and Silver Bullets... I hardly use the tanks that came with them, I have mostly been using a protank 2 mini and a dripping atomizer... not to say that I dont use the tanks that came with them but when I do I use cotton and a 1.3-1.5ohm coil.... I still use the batteries that came with the k1000's, at least until I need some new ones... if you have any questions about the pipe feel free to ask... and if i have the answers i will share...