I re-read little bits a few years down the road after passing (I'm not sad enough to go right through the whole thing). I escaped with three minor typo corrections.
I'm even more of the believe now that my examiners should have sent me packing with significant corrections to resubmit after six months minus the need for a second viva, simply to get the typos flushed out. I actually said at the end of viva when asked, what sort of time frame I needed and I said about three months to flush out the remianing typos. External listed the typos she'd spotted and all but said "That's it, I'm out of here, do the typos and hardbind within the month." Far be it from me to argue and 10 days later I offloaded it.
I must have prepared okay as the viva was all very straight forward. Although the viva was four hours, I knew the way it was going I was through after 20 minutes. She was seriously into the subject, hence the length of time and only one apparently difficult question. My primary supervisor dove in, not realising I'd actually prepared for that question. I'd actually prepared for and been told to expect a kicking.