Not sure if instrument design falls under the scope of the site. Let me know if you can think of a different SE that it might fit better on, but here goes.
If a person with too much time on their hands were to attempt to actually, realistically construct the contraption in the video below, would it be a better to design it with one large hollow chamber on the interior, or to separate it out for the different sub-instruments?
You should only ask practical, answerable questions based on actual problems that you face? – Matthew Read♦ Nov 26 '12 at 17:02