I've only been vaping a month, but I found I really dislike the filler material inside most carts, so I --
1) Use an XL CE2 clearo on my SDMKII w/adaptor.
2) Use a Tank setup on my SD w/adaptor - and/or - use a Tank setup on my Tornego passthrough
3) DD on the DSE901 attys that came with my SD.
If I had to choose just one, I'd keep my shiny, perfect hand-fit SD over the convenient passthrough -- but I'd give up the 901s and keep the clearos w/the adaptor
