Stool for Driver's Coach?

[MagiChau]

I believe this would fall under an item to give a competitive advantage so no.

T33
The only equipment that may be brought in to the Alliance Station is the Operator Console and non-powered signaling devices. Reasonable decorative items, and special clothing and/or equipment required due to a disability may be brought into the Alliance or Kinect Stations. Other items, particularly those intended to provide a competitive advantage for the team, are prohibited.