Re: What does one do without prediction software?
I should have put a smiley in my post, I guess. Too late to edit it in....
However I wasn't joking when I said that my boss would probably fire me if I spent $20 Large on a "system" that lacked the tools needed to use it safely and effectively. Should the flybar support the weight if lifted from *arbitrary* point? Who knows? How will changing a couple of box angles move the center of gravity? Again, who knows? Will changes overload a rigging point? Coverage is important, too, but at least it won't kill anyone...
I'd extend your response A to add "...remove any rigged boxes and set fire to them in conjunction with B) following... for good measure, throw the purchaser on the fire, too. 
, 
, 8)~
~ nudge, wink, etc.
