As I said, it doesn't matter what you guys pick, I'll go along with it.
Killtown, it's reasonably obvious that you're trying to get someone to spitball a concrete figure. Then, if the cloud measures in any way different from that spitballed figure you can say (until the end of time) "but
you guys claim that X% of the fuel burned and that would make the cloud only 95% of the one in the photo!!!"
The point is that the equations done so far are providing estimated ranges. They're not "picking figures" because they know that that would just amount to pulling numbers out of the air. They're trying to actually determine what might have happend on that day. The plane couldn't have had
more fuel than it would have with full tanks, and it must have used up
some of that fuel. That gives a range. The claim that has been advanced is that the cloud in the photo falls
within the expected range, both for it's size and for its position relative to the crash site. It is entirely your responsibility to show some reason (your best, strongest, most compelling reason would be a good one to start with) why anybody should doubt that that cloud
does fall within the expected range.
Nobody here knows exactly how much fuel was on the plane, or how much of it burned. They do not need to know that, or to make that claim, in order to be able to argue that they have seen no evidence to suggest that the cloud is
inconsistent with the range of
possible clouds one might expect in the event of Flight 93 crashing as described in the OV.
So, tell us one strong piece of evidence which should lead us to think that this cloud in fact falls outside of that range.