So I saw the video where they printed on a bed the was way out of level, and raised a couple of questions for me. 1. How necessary is a perfectly level bed with the BB? (Wondering from a kit stand point since I am putting this together myself.) 2. Is it dynamic? Does the sensor take measurements before every move, or does it just check at the beginning to see how far off one side is compared to the others assuming a flat surface? 3. Could the leveling software be manipulated in such a way, that you could leave an object on the bed and print around it? Thanks guys.