Not keen on the fact that most other pipes I've seen have the atty as part of the bowl, but as this doesn't I thought I'd give it a go (plus the refillable cartos are fairly cheap).
I've got Intellicig 401s & Joytech eRolls for out & about, so this is purely for home use. The 510 extensions you're talking about, they'd change the outward appearance of the pipe would they not? Really want something that looks just like this model that I could puff on in my slippers & smoking jacket while drinking a glass of port (OK I haven't got a smoking jacket & I don't particularly like port, but it helps set the image I'm after with the pipe, if you get my drift).