Communicating with Feeder

[StevenB]

Originally Posted by HumblePie

Holy cannoli, keep it simple folks! The analyst has 2 free hands, 2 simple sets of red/white/blue cards or a 3-sided color-coded signalling post will allow communication with both Feeders.

Originally Posted by smistthegreat

... just a simple poster that the analyst would hold up signaling which shape and which side to load on, similar to the play calling cards that Oregon uses in NCAA football...

It's been said more than a few times, but READ THE MANUAL!
In this case, see

Originally Posted by The All-revealing FRC Game Manual

<T25> The only equipment that may be brought on to the ARENA is the OPERATOR CONSOLE,
reasonable decorative items, and special clothing and/or equipment required due to a
disability. Other items, particularly those intended to provide a competitive advantage for
the TEAM, are prohibited.

Signaling items are definitely illegal.