Before I move on further: my entire bridge layout is a personal idea, does not reflect the writers opinion.
1: I would go for 2, too much "specials " going on for 1 person.
2: I think that placement is important to humans, you keep an object stored on a certain location where you can find it back. The MSD probably has a standard position even if it might be able to float freely. To me that standard position would be at the rear backup lcar panels. (Centered on a 40cm high mid console)