9-day update
It's healing quite well, and as earlier estimated, I'm currently at ¾". I am utterly and completely in love with the look: cannot stop looking at it nor stop myself from playing with it. Do wish it would gape, flare out more, so in hopes of that, as well as reaching my 1" goal, it needs at least one more cut.
Again, though, I'm having issues with hard, overly sensitive, even painful ridges forming alongside the cut. I assume it's scar tissue, but I don't know. The second picture shows a sideview of the raised area, with a little bump at the end, almost reminiscent of frenulum remains, which is the worst offender (probably also because there's a small lingering infection down there). I've been carefully slicing away at them with a razor blade, but it's slow-going, also because of very awkward angles. Has anyone else had this problem? If so, what did you do about it?
Anyway, I will be doing another extension before long. Basically, as soon as I can stand to have the clamp on.