[ext555]

Agree that the tool doesn't really support a calendar planning approach , that's why I use omni plan along with it .
It's very easy to export only flagged projects for the coming week to omni plan and see if they actually fit the week .
Obviously this isn't strict GTD but I've found strict GTD really is designed for people with lots of meetings etc on their calendar .

I'm often asked for " time-lines " on things and omni plan helps me factor in that only 60-70% of my time is really available for non-routine tasks and projects .