That's why it's not an upgrade, but a separate game mode. There's a limit to how many time you can transfer. :)
Oh, I see.
Probably doesn't work on Spidertrons, but at least we'll be able to see how it feels to be a MK2 Jetpack Bot.
Although, at least in my case, the first thing I'd do would probably be accidentally jetpack right onto a lava lake.