I have a question on the height rule about you have to stay at 40 inches in height untill the match start. Does it mean when the vex’s start or when the Big Robots start going?
This would be a question for the official Q&A section. Mike Martus will answer official questions there, and converse with the GDC if necessary.
My unnofficial guess would be that you cannot unfold until the robot is enabled (when the big robot match starts). Just a guess though.
I posted and answered the question in the Q & A section where official questions and answers are.