I was just wondering if it is legal to make a case that solely surrounds and protects the vex yaw rate gyroscope sensor. I also was wondering if i could 3D print this piece. I am not sure if this rule helps:
<R7> Robots are allowed the following additional “non-VEX” components:
d. Teams may add non-functional decorations **provided that these do not affect the robot performance in any significant way **or affect the outcome of the match.
I am new so please tell me if this is in the wrong place. 
6717,
It seems like you’re looking for an official ruling from the VEX Robotics Competition GDC. This can only come from questions submitted to the Official VRC Toss Up Q&A. I’ve moved your thread into the appropriate place!
Sorry if there is any delay in your answer.
Let me know if you need something else.
Thank you!
This type of enclosure would be considered functional, thus not allowable by <R7d>. If you wish to make a covering, it would have to be fabricated solely out of VEX legal components. Thus 3D printing would not be allowed.