Pics of my shiny new pro' with 801 to 901 adapter and KR808D-1 carto...
I get sick vapor with this setup...
The vapor is so thick that if I am watching TV I have to wave away the cloud of vapor to be able to see the TV...
I refill a single carto for a week at least, clean it with water and then refill for another week...
I have never had one die like this...
I have done a comparison, and solderless mods produce much more vapor than mods that are soldered with thin wires... (and I have used the same battery in several)
This thing rocks!
The easy way to thread the endcap on is to back it out till it clicks and then screw it in...
I couldn't be happier!
Happy vaping...