I don't know how much of an effort would be to switch the transformer forn 110V use....however I know the feeling! this is really a one of a kind preamp!
I have a Mark IVb from 2008. So it's basically 9 years that I'm playing it and I can say with confidence that the best portable cab I've paired it with is the CAA 1x12 loaded with a celestion century vintage. Light, portable, the dimension is perfect and the small head sits on it just perfect...