Sounds like a good plan B.
If there's a way to limit the amount of power going to the lift it might be a good idea to do so. Get just enough to it that it moves, even if it's a little on the slow side. I doubt the Imps would be monitoring the area for changes in power but you never know.
When the shuttle comes back to pick up the e-web and 2 troopers were they just going to do it from the roof (with the shuttle hovering in case the roof can't handle the weight) or was the gun going to get hauled back down to the ground?