Motorised Marble Machine

Having built the Printable Marble Machine #1 which is hand operated, I wanted to add a motor ..... which led to the redesign of quite a number of parts.
The motor which I settled on is a Pololu 298:1 Micro Metal Gearmotor which attaches onto my plastic mount using the Pololu Micro Metal Gearmotor Bracket. This motor runs off 5V and rotates at 45rpm - just about as fast as I think the design will cope with. It is powered using a 5V DC mains power supply which came with a mobile phone - I replaced the original power connector on the power supply as I wanted to use a 2.1mm DC power jack plug and socket set.

I have uploaded my rather poor video attempt here: http://www.youtube.com/watch?v=YOaXsGhuKLQ

Thanks also go to gzumwalt - he has made some cracking motorised models which motivated me to have a go at this one.