When I get onto SOLAR on Thursday, will there be a good chance that there are cores/labs/tutorials with spots still open so I can change my times around? More specifically, I'm looking to change my 11:30 physics 1bo3 core to the 9:30. Does anyone know if this course normally has spots available?, because right now I have a 7 hour block of classes back to back, and I would really like to change this.

Yes! Make sure you get on Solar asap bc I am pretty sure it will be hard to actually get in bc it'll be so packed! Go on Master timetable and check to see if physics is available at any other time. Make all the changes on your personal timetable using the master timetable and then go on Solar on Thursday and apply those changes.

But dont lose hope if you dont get to switch it up right away. Alot of people drop classes on SOLAR in the first week, there should be spots opening up during teh first few weeks of september.