Replacement Parts Rules clarifacation

[ReggieB]

I am trying to figure out what is legal and what isnt legal in terms of replacment or extra parts for the robot. After success in Annapolis some member of the team wanted to try experimenting with a 2x ball handler. I told them that i would look into what they can legally add to the robot, and that they can work but understand that it might not be used.
Obviously there is no rule against a team working on something that doesnt get used in competition. They understand that their work might not be used.
The other clear rule was that we cant make a system now and bring it to Atlanta in a complete fashion.
It seems clear to me that if we build something there, it should be legal. Just like if you made a last min. decision to remove an existing system, you should be able to make a last min. decision to add a new piece.
So the question is where is the line drawn? Can they bring it in dissasembled form? Can it be drilled/machined before we get there, or must all pieces be stock? Must we use the stuff we shipped with the robot, or can we even bring extra stuff?

There have been a few posts on the Q&A, and FIRST has been very brief and vague.

We are trying to do as much as we can with the robot, but i really dont want to do anything "shady".

And again, if this doesnt seem like it's kosher, so be it.