Fair enough. When I ran the numbers I was surprised how close they came to 100kg, given the motors and batteries used.

I think it would be more realistic to err on the side of caution though. The robot calculator predicts most real robots would be underweight, so there must be something Im missing out, which means Aarons robots would in reality be even more overweight.

I need to put more robot designs through the calculator to try to see where the errors are coming from.