Well this is the second time now the floats have developed leaks at the plastic seams and sunk or partially sunk making the car undrivable.
Being in the U.S we have the more complicated versions, I beleive, that lets them get out of balance easily.
Yeah I actually do know how they work, shame they don't have an adjustable needle as was available on some TR-6s. I do not have a problem with fettling for proper tune, enjoy it actually, but fixing the carbs because they fail in some way is getting old.
Found a site that installs Mikuni Flatsides
www.prirace.com, and they are very interesting products but are geared up for Triumphs and some MGs (1500). But then I'd be in the same place needing to have the siameesed intake machined off the side of the head and fabrication a manifold to hold the flatslides.