Much respect brother, but yea, I've seen just about every video and read the Scholars for 911 Truth hypothesis. The best video for this issue seems to be "9/11 Eyewitnesses" in conjunction with some of the more close up views. I still believe the controlled demolition in towers 1 and 2 were exceptionally strange. In the video above, the explosions were very sudden - and then collapse. Pretty straight forward. As seen in 9/11 Eyewitnesses, there were several explosions (i think 8 in total) far before the explosion that was immediately followed by collapse. Also, the videos make it seem like the detonations are going off while the towers are collapsing. Typically in controlled demolitions, the collapse is after all of the detonations have gone off. But again, there must have been some type of complex system set up.
Then theres the dramatic nature of the explosions. A normal demolition, as shown above, is virtually clear of smoke until it completely collapses. This is why I say that there must have been a secondary external explosion system or, the explosives in the core would have to be much stronger than ususal to cause that kind of cloud on collapse.
Theres no doubt in my mind that explosives must have been used, with proof being in the unexplained total destruction of the central columns, the free-fall decent, plus the molten steel beneath the rubble. If a building simply had a structural collapse due to fire and relatively minor damage...obviously it would be much more gradual and would not have been so symmetrical. So I'm with you, but there's some issues here.
**Another point about the flashes - in the detonation video above, the building is completely gutted, so the flashes would be seen much more easily seen. I realize that many saw flashes, but there are none that are exceptionally clear on video, espcially WTC7**
Opinions welcome - I realize this is nitpicking, but it is something that will come up if this surfaces to public debate.