[Don Wright]

Here's an idea...

Each team must assign a team mentor as the official inspector for that team.

The inspection sheet will have three columns after each checklist item...
Column 1 - For that team's inspector initials
Column 2 - For the team inspector of the team to the right of them in the pit
Column 3 - For the team inspector of the team to the left of them in the pit

(Obviously end of pit lane teams have to go to the next lane over to get their inspectors, but I hope the idea is obvious).

Other than size and weight, you now have three independent inspectors inspecting each robot. In order to compete, you have to have the checklist checked and signed by each inspector plus the weight and height checked.

I.e. pit lanes are like this:
Lane 1: 217, 67, 469, 1114, 830
Lane 2: 330, 27, 222, 1625, 111
...
Last Lane: 65, 71, 171

67's robot is inspected by the inspector from 217, 67, 469
830's robot is inspected by the inspector from 1114, 830, 330
171's robot is inspected by the inspector from 71, 171, 217
217's robot is inspected by the inspector from 171, 217, 67

Lead inspection teams are there to rule over disputes (i.e. the inspectors from the three teams can't agree on whether an item meets the inspection criteria)... Or if something really happens to another team's inspector and they can't inspect another teams robot in time (emergency situation)...