I used to just set the halves on the tv tray next to the bike and then route the fuel pump outlet hose to the carbs.
http://www.vmaxforum.net/showthread.php?t=1427
Check out this thread and set the floats as instructed. Then follow up with the wet method to double check.
Dan-o's idea sounds like a pretty good way to double check yourself without having to mount them back onto the bike. Good thinkin Dan!
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