[EricH]

Originally Posted by dodar

After looking through the manual I didnt see anything about this but i could have missed something, are you allowed to have a pneumatic piston to already have air inside of it?

I'd ask for clarification of this, but I'm pretty sure that <R01> has the answer:

<R01> Energy used by FRC ROBOTS, (i.e., stored at the start of a MATCH), shall come only from the following sources:
...
B. Compressed air stored in the pneumatic system, stored at a maximum pressure of 120 PSI in no more than four Clippard Instruments tanks. Extraneous lengths of pneumatic tubing shall not be used to increase the storage capacity of the air storage system.

Probably something to confirm with the Q&A, but it would be reasonable to assume so.

Now, can you weigh in without the air is the other question...