Segway PT x2 Reference Manual page 29

All Segway PT parts must be approved by Segway, and
properly installed. Never attempt to stand on a Segway PT
without the LeanSteer Frame attached and secured. Using
your Segway PT without all parts properly installed could
damage your Segway PT and result in serious injury from loss
of control, collisions, and falls.
Do not modify the Segway PT. Modifications to the Segway PT
without the prior written approval of Segway could interfere
with the operation of the Segway PT, could result in serious
injury and/or damage, and could void the Segway PT Limited
Warranty.
WARNING!
WARNING!
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