i was thinking about way to put the ports at the endof the tube and use those existing opening in the tube. some of the ends have plastic sleeves or caps.. they have have existing points for penetration of the positive and negative lead. I am also thinking.. why not this segway does not have onboard gps which can be accessessed via bluetooth.. and way to measure wheel rotation to measure sepped ( i think it already does use wheel rotation to measure speed?) and and and onboard compas. . as it is now, I think the segway relies on the cmpas of the smart phone to give sense of direction. . I am also intrested in using the laser safety lighting technology to give better safety like this one