[John G]

After reading the rules, I know that as other people have stated, it doesn't violate R19. However, their mechanism does extend past the 28x38x60 box before the finale. NORMAL CONFIGURATION – The physical configuration and orientation of the ROBOT when the MATCH is started. This is the state of the ROBOT immediately before being enabled by the Field Management System, before the ROBOT takes any actions, deploys any mechanisms, or moves away from the starting location. This configuration is static, and does not change during a single MATCH (although it may change from MATCH to MATCH, specifies config when the match is started.
The finale period only has rules about the last 20 seconds. So can any robot expand without bound ( up to the field perimeter) until the last 20 seconds, or am I over analyzing this? The rules only prevent you from being outside the frame limits when the match starts and the finale, but nothing about the middle 100 seconds.