In most cases I have found carb cleaner and compressed air to be good enough for cleaning.
Good spot with the syncing of the carbs. That will really cause havoc with starting and running. You should be able to balance them good enough to run quite well then use vacuum gauges when you start her up again.
I am unaware of a dimensional setting for the carb floats. I always start with the tang horizontal then use the clear tube to set the levels in the bowls as described in the manual.
When set up properly the bikes revs will increase on choke as the engine initially warms up. that is the sign to reduce/cut the choke.