[rmmlg]

I've tried it out and gotten moving a part to change the cg. You must go under tools and then go to update mass properties. If the cg marker is gray, then you need to do update mass properties in order to get an accurate position.

I've also had a lot of luck with getting a weight estimate for our bot with it. For our chassis and drive train, Inventor estimated 55 pounds, and it was actually 53 pounds. I had to place in dead weights for things such as compressor and motors since the cad models aren't weight accurate. I presume that the cg is jsut as accurate. Just remember to add in your battery weight and the weight of any tetras, etc that you are picking up.