Does anyone have any insight on doing time lapse recording on a Canon GL2? Canon refers to it as "Interval Recording" and it looks like I have to choose both the length of time it shoots at each interval (.5 seconds to 2 seconds at 4 intervals: .5, 1, 1.5, and 2 seconds) and the length of the interval between footage (at 4 intervals: 30 sec, 1 min, 5 min., 10 min.) I need to use the camera for work - we are going to demolish a structure that will probably take 2-4 days to remove and I'm wondering what settings would be best?