[Al Skierkiewicz]

On the question of disassembling the compressor head and reorienting the answer would be no. You may not modify any of the pneumatic parts. See R73 for a complete list of items not allowed in the pneumatic system.

On the question of splitting the high pressure side to feed two sides of the robot, this part of rule R72 would seem to indicate it is allowed.

G. Pressure regulators with a maximum bypass pressure of no more than 60psi.

However to satisfy the other parts of the pneumatic rules, the second regulator would also need a gauge to indicate 60 psi.
As to the question of adding a "T" fitting to allow the relief valve to be mounted at the compressor, there does not appear to be any rule that would prevent it. The intent of the pressure relief valve is to protect the system in the case of a failure in the pressure switch and a blockage in the output of the compressor. I believe that a "T" would fulfill this safety feature. However, a team must ask this question on the Q&A.