there are two 12V battery's on the trolley one is for the drill that moves the trolley back and forth at different speeds and the other battery powers the 12 channel relay controller there are 8AAs that power the two 3v motors on camera turret witch i scrapped from a robotic arm

Ive bean looking to this for quite some time and this is what i came up with what do you think? i must say it needs some little adjustments
http://hbsboard.com/index.php?action=dlattach;topic=3056.0;id=3530;image
http://hbsboard.com/index.php?action=dlattach;topic=3056.0;id=3531;image
http://hbsboard.com/index.php?action=dlattach;topic=3056.0;id=3532;image
http://hbsboard.com/index.php?action=dlattach;topic=3056.0;id=3533;image
http://hbsboard.com/index.php?action=dlattach;topic=3056.0;id=3534;image
http://hbsboard.com/index.php?action=dlattach;topic=3056.0;id=3535;image

i can't get the link to work, but sounds interesting - you use an electric drill? Isn't that noisy?

the link should work now the drill motor has a hum but there is not mic on that camera the cablecam is more for b roll