Red, you stated that you do not have an answer to the above question, which I believe is far more intellectually honest than just making up an unsupported speculative opinion just to make the CD theory possible. However, I hope you do realize that somewhere along the path between the official explanation of 9/11 and proving that there was a conspiracy that involves the CD of WTC7, that question will have to be answered.
Why would you not take a break from JREF and, instead, spend some of that time talking to a few of the firefighters who were there on 9/11? You have made over 1,500 posts here and probably are no closer now to the hard truth about firefighter accounts than you were when you first started here, despite the best efforts of many here to point you in the right direction on this issue. If you are truly interested in the pursuit of truth, it would seem that getting clarification from the firefighters on your lingering questions would be a critical step. Are you just hoping that someone else will contact the firefighters to clarify your critical questions? Do you fear what the firefighters would tell you? I know I would if I were in your position. If they gave the answers I suspect they would give (in further support of the official explanation of WTC7 collapse), I would have one of three options: 1) declare the firefighters to be erroneous/incompetent, 2) declare the firefighters to be accomplices or 3) abandon any conspiracy arguments that attempt to manipulate firefighter accounts into supporting a CD theory. I assume that none of those options are very attractive to many conspiracy theorists.
The accounts of the firefighters wholly support the official explanation of the events of 9/11. They do not, as they stand now, in any way whatsoever, support the theory that WTC7 was intentionally demolished as part of a conspiracy. Contact the firefighters to get the answers you seek, or stop trying to cram the firefighter accounts into your theory.