[Jon Stratis]

To get a "close enough" weight of the robot, use a simple bathroom scale. Set one end of the robot on the scale, the other on a block to keep the robot level - that'll give you "half" of your weight. spin the robot around, and now you have the other "half".

I put half in quotes, because it's not really half - if your center of gravity isn't in the middle of the robot, you'll see one end weight more than the other. This can be a great way to help discover and fix CoG issues.