I have made life easier for myself by dropping the constraint of having the demolition preparation job done in a weekend. If 911research is right, then demolition can be prepared from the elevator and hence there is no need for a rush. The weekend scenario was based on the notion that the power was switched off, so no regular workers doing overtime, so the Israelis could work undisturbed.
http://911research.wtc7.net/sept11/analysis/scenario404.html
The demolitions of the Twin Towers and Building 7 are accomplished through the detonation of high-explosive charges inconspicuously installed in all three buildings' elevator shafts, and, in the case of Building 7, small cutter charges placed adjacent perimeter columns near the building's base.
The deployment of the explosive charges in the three World Trade Center skyscrapers is performed by a team of just three technicians working over a period of about four weeks. The explosive charges, disguised to look like lighting fixtures, are placed on the roofs of elevator cars and installed on the inside walls of the elevator shafts by a technician riding on the elevator.
No need for a power cut, just a little fence placed in front of the elevator door saying 'out of service'.
Talking about WTC... Zakheim was CEO of SPC for four years. it was an SPC subsidiary, TRIDATA CORPORATION, that oversaw the investigation after the terrorist attack on the World Trade Center in 1993. The suggestion has been made that Zakheim, the most likely mastermind of 9/11, had access to the building plans of the Twin Towers.
So here is the chain: Zakheim-WTC construction plans-PNAC-remote control-comptroller of Pentagon Department that got hit on 9/11.