I was really happy today when my new provari and my 5v regulated sabertouch arrived. The problem however is my usual dual coil cartomisers do not work on them. On the provari I get the message that tells me that I need a higher resistance cartomiser. The trouble is I do not understand all the Ohm stuff so I would be really gratefull if someone could point me in the right direction for cartomisers (preferably dual coil) that will work at 5v plus.