Hi Blends, that is a very safe build. You should be drawing less than 6A. The battery is rated at 15A, so you have more than a 50% safety margin. You are using a regulated mod which does all sorts of black magic with voltages so don't let that bother you.
I DIY because of cost - I could never afford to buy the amount of juice I go through! All my juices are tailored to my specific taste which I am told is wierd. DIY is a lot of fun and creating a flavour that is perfect for you is immensely satisfying
@CloudHouse Is the actual button sticking or stiff? I regularly put the whole thing in the ultrasonic cleaner, give it a shake dry, wait a bit and dry it with a hair drier. None of mine have a button issue - they are all as smooth as silk.
They are brilliant little devices. I use a Wasp with a Smiley coil (.24 Ohm Fused alien) on them (I have 4). As for the fire button, you need to clean the contacts with some electric contact cleaner every now and then. You will get used to to the soft bottle quite soon - it takes a bit of practice.