Rule R18?

[mrnoble]

You may bring to the competition up to 45 pounds worth of parts for your robot that either you, or someone whom you paid or who sponsors you, made or modified specifically for the robot. This does not include items such as motors, screws, or other Commercial Off The Shelf (COTS) parts, nor does it include raw materials, such as uncut aluminum rod or sheet stock, for example. Raw material and COTS parts you are allowed to bring as much as you like.

None of the items allowed in the 45 pounds need to be in your bag for B&T day. You may set them aside to bring to competition, or you may continue to work on them after B&T, and add them to the robot when you unbag it at competition.

R18 also specifically says that some items are excluded from the bag and don't count toward the 45 pounds; these include bumpers, batteries, and the operator console.