Thank you Katya, I will read the thread and study the findings.
I think there is a big demand for carto's which are safe, reliable and re-usable that can be used on 6V.
Despite the demand, there is no carto out there that will work reliably at 6v. Anytime you use a wire/coil wrapped with a clothe, wet or not, at the kind of heat 6v puts out you are going to have burning. Cartos are not designed to be used at more then 3.7v. Some people have luck at 5v if they are extremely careful in using them, but the carto itself is just not designed for that kind of use.
Back on topic, I emailed WordUp about the 808 cartos last night and never got a response. Hopefully Katya will have better luck. I want to make sure the ones on site are the SLB style with the coil instead of the wire before I order.