[IKE]

Also having a succint list of the attributes is a good idea. We sometimes get nervous and forget the details. Having a sheet of paper with an Iso-view or exploded view of your drivetrain (even a picture will work fine). then have a series of bullet points or key points with arrows pointing to them:

Basic Function
why this is better.
Give examples of how this feature helped you in competition.
removed 0.5 pounds here.
Clever use of material here.


Also, many judges will accidentally give away what awards they are looking for most. If the judge keeps asking about communitee outreach and team recognition throughout the community, they are probably not as concerned about your drivetrain.

Consider these little interviews like any other. Get their attention from the start. Engage them (you shouldn't be doing all the talking). Know all the points you want to make (ideally in a logical procession). Thank them for their time and consideration, and let them know that you understand just how tough their job is.