I can't comment on recent surgical techniques, but when I was in Montreal having my inversion, there was an absolutely stunning--I mean stunning beyond human comprehension--girl from France who was there with her husband. She'd had the colon surgery done by a very reputable surgeon, but was seeing Dr. Menard to see if he could help with her issues....constant need for pads due to the over-secretion of fluids from the neovag lining, and also the odor. (Side note: he was unable to help her, after several visits/exams, and she had to go back home without any kind of corrective surgery--there was nothing anyone could do)
That was a bit over 20 years ago, so maybe the techniques have changed. I personally found the inversion technique quite satisfactory and unclockable and without any complications...and over time the tissue does change to being vag cells so it does self lube and stretch. I don't think I have the kind of depth that girl had, although I'm quite satisfied with what I have--I just don't think the complications would be worth it imo.
I would be interested in hearing how the colon surgery turns out nowadays.