This video shows their mechanism in action:
http://www.thebluealliance.net/tbatv...p?matchid=5183
Their robot appears to be legal from an inspection standpoint, and should be permitted to compete. However, per <G22>, they should be assessed a 10-point penalty every time their arm extends into the previous quadrant, such as at 1:07 in the linked video. This Q&A response should be nothing new... it only reaffirms the way the rule has been written since kickoff.