[EricH]

Please, read <R01-D>. Springs would be a robot part.

You should also note that (at least in the past) it's been allowed to have pneumatic power ready to fire while the robot is being hauled onto the field. And who ever charged a battery while on the field?

In other words, as long as it's an allowed material (found in 4.3.7--<R02> tells you what you can't use), and it's safe (the blue box), knock yourself out.