"Oh, you know!" she answered, in a tone that made it clear that was all the answer that was needed. "And it's not super tough unless you want to get deep inside, he's just really compact. I got the antigravity part working myself--" she flipped him over and popped open a panel under one of his bottom flaps, exposing the circuitry underneath. A small gyroscopic attachment was just barely visible, and she tapped it with her nail. "It was really convenient to have him float in space, but he didn't used to be able to do that under gravity. Which was a total pain once I was in gravity all the time! So I poked around and turns out he had this thing in him the whole time, it just needed to be messed with a bit."