Apparently the 403 PCC is the same as the 402, just 10mm shorter. I've looked at other models, but I like the small size of the 403. I'm using cartomizers with it from electronic-cigz with 24mg juice and to me it almost looks, feels, and hits like an analog which I think is great! Just the battery life is not so good so I was stuck lugging around my m602 batteries and a bottle of juice. And dripping/dipping just becomes a pain in the .... after some time.
I figure a fully charged PCC, two fully charged 403 batteries, and 4 full cartomizers will last me all day.
Thanks for the tip on wiping down the threads before charging. Anything that will increase the life of the product, the better.