On the list of private jet cabin items, the vacuum waste system rarely gets top billing. Designers find it a slightly embarrassing topic of conversation, fraught with smirks and potty humor. The engineers just want to get it over with as quickly as possible so they can get on to grander projects. And all the owner wants is one that works. At B/E Aerospace’s Ecosystems division, the waste disposal system gets more attention–a lot more, as can be seen at the company’s exhibit here (Booth No. 2059).