Practicing with 2 robots at the World Championships

I would like to get an official ruling as to if the following will be legal or not. I have a team of 4 6th grade students, with 2 being our teamwork/driver skills challenge drivers. We will be attending the world championships and it is very important that I have all 4 members fully engaged. I would like to have the team prepare a second robot which will be used only as a platform to test our programming skills code. Once we are satisfied we have a code we like, it will be loaded into the brain of the competition robot which these 2 students will use in the programming challenge. The test robot will not be used in any skills challenges or teamwork challenge, but only for practice and testing.

Peter Van Buren
VEX Teams 817
East Longmeadow, Mass.

Yes, this is a legal practice.