Those evil cartomizers!!!!

[prof beard]

So what do you need to do to use cartomisers with a 901 thread device?

 

[Lightgeoduck]

well the main issue is the carts fit on the 901 (98% of the time) but cartos need ventilation so you can get an extention and drill a whole or I believe you can use a staple mod (i think you can do a search) but I think the premise is that you wedge a staple between the 901 batt connector and the cartos as you screw it on providing a gap for venting...
EDIT: or if you are brave you can drill a tiny hole or two right under the threads of your 901 bat

So what do you need to do to use cartomisers with a 901 thread device?