RE: Turnigy H.A.L. (Heavy Aerial Lift)
Hi,
Mine is still in China waiting to ship to the USA. Here is another thread with some flying [link=http://www.rcgroups.com/forums/showthread.php?t=1662630&page=2]video[/link].
I think your analysis is accurate. You can always change battery capacity depending upon what other payload is required.
Regards.