When playing playing a bass with downtuned strings do people often have to adjust the curvature of the neck so that the strings don't rattle? Or do the raise the strings at the bridge?

Example: I was listening to Bowie's "87 and Cry" and it sounds like he's playing a low C on the 1st string. 28 second mark...

Ok, so my parents went to Peru for a while and brought me back this beautiful acoustic guitar made by a small Peruvian shop called Effo Guitars. Upon first playing this acoustic, it sounded great and was very easy to play. However, it had ridiculously light gauged strings on it, which are not suitable for the style of music that I play.