I am not using Project as a scheduler but more to create a graphic display of non-linked events who's start and end dates may change. The duration of these events is the variable. So today I may enter one of these events to start today and end in two weeks and then tomorrow I may learn it will actually start next week and end in two months.

I had accomplished this using milestones and rolling them up to a summary task. When I changed the date of either milestone the summary would stretch or shrink. I was hoping to simplify things by doing this with just a task bar.