The climb / hang tool for the robotics team is done enough for now. In this clip you can see that the robot basically flips upside down when it tries to climb - so then I add our battery to see how it changes things. I can move the battery's placement to see how it affects our center of mass and therefore how we hang.

The tool now has a few real-world materials to choose from, and will automatically calculate the mass of objects based on their material and dimensions. It has a few options relevant to our team, and an option to override the mass for special cases (like the battery).

You can screw around with it at

(The mass of the battery is overestimated in the video because I forgot to change the quantity to there are two batteries, apparently.)